Standard Lemma guide

complement

noun · verb · 34 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /ˈkɒmpləmənt/
  • General-American: /ˈkɑmpləmənt/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • homophone: compliment (in some dialects)
  • CMU ARPABET: K AA1 M P L AH0 M AH0 N T Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The totality, the full amount or number which completes something.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The whole working force of a vessel.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: nautical, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An angle which, together with a given angle, makes a right angle.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: astronomy, geometry, mathematics, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Something which completes, something which combines with something else to make up a complete whole; loosely, something perceived to be a harmonious or desirable partner or addition.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A word or group of words that completes a grammatical construction in the predicate and that describes or is identified with the subject or object.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: grammar, human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A phonetic complement is a graphic element that modifies another, such as (in Linear B script) a small syllabogram that is attached to a logogram as an abbreviation of its reading (as opposed to an adjunct that abbreviates an adjective that modifies that logogram).

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: biology, epigraphy, geography, history, human-sciences, linguistics, literature, media, natural-sciences, palaeography, paleogeography, paleography, paleontology, phonetics, phonology, publishing, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

An interval which, together with the given interval, makes an octave.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: entertainment, lifestyle, music

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

The color which, when mixed with the given color, gives black (for mixing pigments) or white (for mixing light).

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: engineering, natural-sciences, optics, physical-sciences, physics

Examples

  • The complement of blue is orange.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

Given two sets, the set containing one set's elements that are not members of the other set (whether a relative complement or an absolute complement).

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: mathematics, sciences, set-theory

Examples

  • The complement of the odd numbers is the even numbers, relative to the natural numbers.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

One of several blood proteins that work with antibodies during an immune response.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: immunology, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

An expression related to some other expression such that it is true under the same conditions that make other false, and vice versa.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: human-sciences, logic, mathematics, philosophy, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

noun

Meaning 12

A voltage level with the opposite logical sense to the given one.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: business, electrical-engineering, electricity, electromagnetism, electronics, energy, engineering, natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

noun

Meaning 13

A bit with the opposite value to the given one; the logical complement of a number.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

14

noun

Meaning 14

The diminished radix complement of a number; the nines' complement of a decimal number; the ones' complement of a binary number.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

Examples

  • The complement of 01100101#95;2 is 10011010#95;2.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

15

noun

Meaning 15

The radix complement of a number; the two's complement of a binary number.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

Examples

  • The complement of 01100101#95;2 is 10011011#95;2.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

16

noun

Meaning 16

The numeric complement of a number.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

Examples

  • The complement of −123 is 123.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

17

noun

Meaning 17

A nucleotide sequence in which each base is replaced by the complementary base of the given sequence: adenine (A) by thymine (T) or uracil (U), cytosine (C) by guanine (G), and vice versa.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: biology, genetics, medicine, natural-sciences, sciences

Examples

  • A DNA molecule is formed from two strands, each of which is the complement of the other.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

18

noun

Meaning 18

Synonym of alexin.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: alexin

Antonyms: none provided

19

noun

Meaning 19

Abbreviation of complementary good.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, countable, uncountable

Topics: economics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

20

noun

Meaning 20

Something (or someone) that completes; the consummation.

Definition source: English Wiktionary via Wiktextract

Usage: archaic, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

21

noun

Meaning 21

The act of completing something, or the fact of being complete; completion, completeness, fulfilment.

Definition source: English Wiktionary via Wiktextract

Usage: countable, obsolete, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

22

noun

Meaning 22

Something which completes one's equipment, dress etc.; an accessory.

Definition source: English Wiktionary via Wiktextract

Usage: countable, obsolete, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

23

noun

Meaning 23

Obsolete spelling or misspelling of compliment.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

24

verb

Meaning 24

To complete, to bring to perfection, to make whole.

Definition source: English Wiktionary via Wiktextract

Examples

  • We believe your addition will complement the team.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

25

verb

Meaning 25

To provide what the partner lacks and lack what the partner provides, thus forming part of a whole.

Definition source: English Wiktionary via Wiktextract

Examples

  • The flavors of the pepper and garlic complement each other, giving a very rich taste in combination.
  • I believe our talents really complement each other.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

26

verb

Meaning 26

To change a voltage, number, color, etc. to its complement.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

27

verb

Meaning 27

Obsolete spelling or misspelling of compliment.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

28

noun

Meaning 28

something added to complete or embellish or make perfect

Definition source: Princeton WordNet 3.0

Examples

  • a fine wine is a perfect complement to the dinner
  • wild rice was served as an accompaniment to the main dish

Meaning relationships

Synonyms: accompaniment

Antonyms: none provided

Broader terms: adjunct

29

noun

Meaning 29

either of two parts that mutually complete each other

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: counterpart, opposite number, vis-a-vis

30

noun

Meaning 30

a word or phrase used to complete a grammatical construction

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: construction, grammatical construction, expression

31

noun

Meaning 31

number needed to make up a whole force

Definition source: Princeton WordNet 3.0

Examples

  • a full complement of workers

Meaning relationships

Synonyms: full complement

Antonyms: none provided

Broader terms: work force, workforce, manpower, hands, men

Narrower terms: ship's company, company

32

noun

Meaning 32

a complete number or quantity

Definition source: Princeton WordNet 3.0

Examples

  • a full complement

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: count

33

noun

Meaning 33

one of a series of enzymes in the blood serum that are part of the immune response

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: enzyme

34

verb

Meaning 34

make complete or perfect; supply what is wanting or form the complement to

Definition source: Princeton WordNet 3.0

Examples

  • I need some pepper to complement the sweet touch in the soup

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: balance, equilibrate, equilibrize, equilibrise

History

Etymology

From Middle English complement, from Latin complēmentum (“that which fills up or completes”), from compleō (“to fill up; to complete”) (English complete). Doublet of compliment. The verb is from the noun.

See compliment.

Across languages

Translations

118 source translations are retained for this English entry.

  • Bulgarian: допълнение (dopǎlnenie) — something which complements
  • Bulgarian: добавка (dobavka) — something which complements
  • Finnish: täydennys — something which complements
  • French: complète — something which complements
  • Galician: complemento — something which complements
  • German: Komplement — something which complements
  • Greek: συμπλήρωμα (symplíroma) — something which complements
  • Italian: completamento — something which complements
  • Italian: complemento — something which complements
  • Latin: complementum — something which complements
  • Portuguese: complemento — something which complements
  • Russian: дополне́ние (dopolnénije) — something which complements
  • Russian: доба́вка (dobávka) — something which complements
  • Spanish: complemento — something which complements
  • Ukrainian: доповнення (dopovnennja) — something which complements
  • Ukrainian: добавка (dobavka) — something which complements
  • Finnish: komplementti — angle which, together with a given angle, makes a right angle
  • Galician: ángulo complementario — angle which, together with a given angle, makes a right angle
  • Greek: συμπληρωματική γωνία (sympliromatikí gonía) — angle which, together with a given angle, makes a right angle
  • Italian: angolo complementare — angle which, together with a given angle, makes a right angle
  • Portuguese: ângulo complementar — angle which, together with a given angle, makes a right angle
  • Russian: дополне́ние до прямо́го угла́ (dopolnénije do prjamóvo uglá) — angle which, together with a given angle, makes a right angle
  • Tagalog: kapuno — angle which, together with a given angle, makes a right angle
  • Tagalog: sihang kapuno — angle which, together with a given angle, makes a right angle
  • German: Komplement — the set containing one set's elements that are not members of the other set
  • Chinese Mandarin: 相对补集 (xiāngduì bǔ jí) — set theory: relative complement
  • Czech: doplněk — set theory: relative complement
  • Greek: σχετικό συμπλήρωμα (schetikó symplíroma) — set theory: relative complement
  • Italian: insieme complemento — set theory: relative complement
  • Italian: insieme differenza — set theory: relative complement
  • Japanese: 差集合 (sashūgō) — set theory: relative complement
  • Polish: dopełnienie — set theory: relative complement
  • Russian: ра́зность мно́жеств (ráznostʹ mnóžestv) — set theory: relative complement
  • Ukrainian: доповнення множин (dopovnennja množyn) — set theory: relative complement
  • Vietnamese: phần bù tương đối — set theory: relative complement
  • Chinese Mandarin: 绝对补集 (juéduì bǔ jí) — set theory: absolute complement
  • Finnish: komplementti — set theory: absolute complement
  • Greek: συμπλήρωμα (symplíroma) — set theory: absolute complement
  • Italian: insieme complemento — set theory: absolute complement
  • Italian: complemento assoluto — set theory: absolute complement
  • Japanese: 補集合 (hoshūgō) — set theory: absolute complement
  • Polish: dopełnienie — set theory: absolute complement
  • Romanian: complementară — set theory: absolute complement
  • Romanian: complement — set theory: absolute complement
  • Russian: дополне́ние (dopolnénije) — set theory: absolute complement
  • Ukrainian: доповнення (dopovnennja) — set theory: absolute complement
  • Vietnamese: phần bù tuyệt đối — set theory: absolute complement
  • Finnish: komplementti — expression which is true when the other is false, and vice versa
  • Arabic: عُمْدَة (ʕumda) — word or group of words completing the predicate, identified with the subject or object
  • Armenian: լրացում (lracʻum) — word or group of words completing the predicate, identified with the subject or object
  • Bulgarian: допълнение (dopǎlnenie) — word or group of words completing the predicate, identified with the subject or object
  • Czech: doplněk — word or group of words completing the predicate, identified with the subject or object
  • Dutch: complement — word or group of words completing the predicate, identified with the subject or object
  • Esperanto: komplemento — word or group of words completing the predicate, identified with the subject or object
  • Finnish: määre — word or group of words completing the predicate, identified with the subject or object
  • Finnish: attribuutti — word or group of words completing the predicate, identified with the subject or object
  • Finnish: predikatiivi — word or group of words completing the predicate, identified with the subject or object
  • Galician: complemento — word or group of words completing the predicate, identified with the subject or object
  • Hungarian: alanykiegészítő — word or group of words completing the predicate, identified with the subject or object
  • Hungarian: tárgykiegészítő — word or group of words completing the predicate, identified with the subject or object
  • Hungarian: vonzat — word or group of words completing the predicate, identified with the subject or object
  • Hungarian: állandó határozó — word or group of words completing the predicate, identified with the subject or object
  • Japanese: 補部 (hobu) — word or group of words completing the predicate, identified with the subject or object
  • Japanese: 補語 (hogo) — word or group of words completing the predicate, identified with the subject or object
  • Japanese: 補文 (hobun) — word or group of words completing the predicate, identified with the subject or object
  • Malay: komplemen — word or group of words completing the predicate, identified with the subject or object
  • Malay: pelengkap — word or group of words completing the predicate, identified with the subject or object
  • Manx: aachione — word or group of words completing the predicate, identified with the subject or object
  • Mongolian: гүйцээвэр (güjceever) — word or group of words completing the predicate, identified with the subject or object
  • Russian: дополне́ние (dopolnénije) — word or group of words completing the predicate, identified with the subject or object
  • Turkish: tümleç — word or group of words completing the predicate, identified with the subject or object
  • Finnish: komplementti — bit with the opposite value to the given one
  • Finnish: binäärikomplementti — bit with the opposite value to the given one
  • Finnish: yhden komplementti — diminished radix complement of a number
  • Finnish: kahden komplementti — radix complement of a number
  • Finnish: vastaluku — numeric complement of a number
  • Galician: complementario — interval which, together with the given interval, makes an octave
  • Greek: συμπλήρωμα (symplíroma) — interval which, together with the given interval, makes an octave
  • Finnish: komplementtiväri — color which, when mixed with the given color, gives black
  • Finnish: täydennysväri — color which, when mixed with the given color, gives black
  • Finnish: vastaväri — color which, when mixed with the given color, gives black
  • Galician: complementaria — color which, when mixed with the given color, gives black
  • Greek: συμπληρωματικό χρώμα (sympliromatikó chróma) — color which, when mixed with the given color, gives black
  • Russian: дополни́тельный цвет (dopolnítelʹnyj cvet) — color which, when mixed with the given color, gives black
  • Russian: после́довательность комплемента́рных основа́ний (poslédovatelʹnostʹ komplementárnyx osnovánij) — nucleotide sequence in which each base is replaced by the complementary base of the given sequence
  • Finnish: komplementti — one of several blood proteins that work with antibodies during an immune response
  • Galician: complemento — one of several blood proteins that work with antibodies during an immune response
  • Russian: комплеме́нт (komplemént) — one of several blood proteins that work with antibodies during an immune response
  • Spanish: complemento — one of several blood proteins that work with antibodies during an immune response
  • Bulgarian: допълвам (dopǎlvam) — to complete
  • Czech: doplnit — to complete
  • Dutch: aanvullen — to complete
  • Dutch: volmaken — to complete
  • French: compléter — to complete
  • German: ergänzen — to complete
  • German: komplementieren — to complete
  • Greek: συμπληρώνω (sympliróno) — to complete
  • Hindi: पूरक (pūrak) — to complete
  • Italian: completare — to complete
  • Portuguese: completar — to complete
  • Russian: дополня́ть (dopolnjátʹ) — to complete
  • Russian: допо́лнить (dopólnitʹ) — to complete
  • Spanish: complementar — to complete
  • Turkish: tamamlama — to complete
  • Turkish: tamamlamak — to complete
  • Turkish: tekmil — to complete
  • Turkish: tekmil etmek — to complete
  • Ukrainian: доповнювати (dopovnjuvaty) — to complete
  • Bulgarian: допълвам (dopǎlvam) — to provide what the partner lacks and lack what the partner provides
  • Catalan: complementar — to provide what the partner lacks and lack what the partner provides
  • Dutch: aanvullen — to provide what the partner lacks and lack what the partner provides
  • Estonian: täiendama — to provide what the partner lacks and lack what the partner provides
  • Finnish: täydentää — to provide what the partner lacks and lack what the partner provides
  • French: complémenter — to provide what the partner lacks and lack what the partner provides
  • Greek: αλληλοσυμπληρώνω (allilosympliróno) — to provide what the partner lacks and lack what the partner provides
  • Hebrew: השלים (hishlím) — to provide what the partner lacks and lack what the partner provides
  • Māori: kīnaki — to provide what the partner lacks and lack what the partner provides
  • Spanish: complementar — to provide what the partner lacks and lack what the partner provides
Real reading context

complement in complete knowledge articles