Standard Lemma guide

constant

adj · name · noun · 18 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: kŏn'stənt
  • UK: /ˈkɒnstənt/
  • US: /ˈkɑnstənt/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: K AA1 N S T AH0 N T Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Unchanged through time or space; permanent.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Consistently recurring over time; persistent.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: amaranthine, solid, ceaseless, constant, continual, continuate, continuous, dreich, endless, eternal, everlasting, extended, incessant, incessive, infinite, never-ending, nonstop, ongoing, perpetual, persistent, relentless, steady, still, termless, unbroken, unceasing, unending, unintermitted, uninterrupted, unremitting, lasting, permanent, successive, uniform

Antonyms: none provided

3

adj

Meaning 3

Steady in purpose, action, feeling, etc.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Firm; solid; not fluid.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Consistent; logical.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adj

Meaning 6

Bounded above by a constant.

Definition source: English Wiktionary via Wiktextract

Qualifier: complexity theory

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

Examples

  • constant time constant space

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

name

Meaning 7

A male given name from Latin, feminine equivalent Constance.

Definition source: English Wiktionary via Wiktextract

Usage: rare

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

name

Meaning 8

A surname.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

name

Meaning 9

A populated place in Saint George parish, Barbados.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

That which is permanent or invariable.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

A quantity that remains at a fixed value throughout a given discussion or operation.

Definition source: English Wiktionary via Wiktextract

Topics: algebra, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: variable

12

noun

Meaning 12

Any property of an experiment, determined numerically, that does not change under given circumstances.

Definition source: English Wiktionary via Wiktextract

Topics: sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

noun

Meaning 13

An identifier that is bound to an invariant value; a fixed value given a name to aid in readability of source code.

Definition source: English Wiktionary via Wiktextract

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

adjective

Meaning 14

steadfast in purpose or devotion or affection

Definition source: Princeton WordNet 3.0

Examples

  • a man constant in adherence to his ideals
  • a constant lover
  • constant as the northern star

Meaning relationships

Synonyms: none provided

Antonyms: inconstant

15

adjective satellite

Meaning 15

uninterrupted in time and indefinitely long continuing

Definition source: Princeton WordNet 3.0

Examples

  • the ceaseless thunder of surf
  • in constant pain
  • night and day we live with the incessant noise of the city
  • the never-ending search for happiness
  • the perpetual struggle to maintain standards in a democracy
  • man's unceasing warfare with drought and isolation
  • unremitting demands of hunger

Meaning relationships

Synonyms: ceaseless, incessant, never-ending, perpetual, unceasing, unremitting

Antonyms: none provided

16

adjective satellite

Meaning 16

unvarying in nature

Definition source: Princeton WordNet 3.0

Examples

  • maintained a constant temperature
  • principles of unvarying validity

Meaning relationships

Synonyms: changeless, invariant, unvarying

Antonyms: none provided

17

noun

Meaning 17

a quantity that does not vary

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: constant quantity, invariable

Antonyms: none provided

Broader terms: quantity

Narrower terms: parameter, parametric quantity

18

noun

Meaning 18

a number representing a quantity assumed to have a fixed value in a specified mathematical context

Definition source: Princeton WordNet 3.0

Examples

  • the velocity of light is a constant

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: number

Narrower terms: Avogadro's number, Avogadro number, Boltzmann's constant, coefficient, cosmological constant, equilibrium constant, gas constant, universal gas constant, R, gravitational constant, universal gravitational constant, constant of gravitation, G, Hubble's constant, Hubble constant, Hubble's parameter, Hubble parameter, ionic charge, factor of proportionality, constant of proportionality, speed of light, light speed, c

History

Etymology

From Middle English constant, from Old French constant, from Latin constantem, accusative of constans, from cōnstāre (“to stand firm”). Displaced native Old English singal.

Across languages

Translations

226 source translations are retained for this English entry.

  • Arabic: ثَابِت (ṯābit) — unchanged through time
  • Azerbaijani: daimi — unchanged through time
  • Azerbaijani: mütəmadi — unchanged through time
  • Breton: kendalc'hus — unchanged through time
  • Bulgarian: постоянен (postojanen) — unchanged through time
  • Bulgarian: неизменен (neizmenen) — unchanged through time
  • Catalan: constant — unchanged through time
  • Dutch: constant — unchanged through time
  • Esperanto: konstanta — unchanged through time
  • Estonian: püsiv — unchanged through time
  • Finnish: pysyvä — unchanged through time
  • Finnish: muuttumaton — unchanged through time
  • Finnish: vakaa — unchanged through time
  • Finnish: vakio- — unchanged through time
  • French: constant — unchanged through time
  • Galician: constante — unchanged through time
  • Georgian: მუდმივი (mudmivi) — unchanged through time
  • German: beständig — unchanged through time
  • German: konstant — unchanged through time
  • Greek: σταθερός (statherós) — unchanged through time
  • Greek: συνεχής (synechís) — unchanged through time
  • Ancient Greek: συνεχής (sunekhḗs) — unchanged through time
  • Hindi: स्थिर (sthir) — unchanged through time
  • Hindi: अचल (acal) — unchanged through time
  • Hungarian: állandó — unchanged through time
  • Hungarian: változatlan — unchanged through time
  • Ido: konstanta — unchanged through time
  • Indonesian: konstan — unchanged through time
  • Indonesian: tetap — unchanged through time
  • Ingrian: jokaaikain — unchanged through time
  • Irish: diongbháilte — unchanged through time
  • Italian: costante — unchanged through time
  • Kazakh: тұрақты (tūraqty) — unchanged through time
  • Latin: constans — unchanged through time
  • Māori: pūmau — unchanged through time
  • Māori: tūmau — unchanged through time
  • Māori: taimau — unchanged through time
  • Māori: aumou — unchanged through time
  • Old English: singal — unchanged through time
  • Persian: ثابت (sâbet) — unchanged through time
  • Plautdietsch: bestendich — unchanged through time
  • Polish: stały — unchanged through time
  • Portuguese: constante — unchanged through time
  • Romanian: constant — unchanged through time
  • Romanian: neschimbat — unchanged through time
  • Russian: постоя́нный (postojánnyj) — unchanged through time
  • Scottish Gaelic: seasmhach — unchanged through time
  • Serbo-Croatian: postojan — unchanged through time
  • Serbo-Croatian: stalan — unchanged through time
  • Spanish: constante — unchanged through time
  • Swedish: konstant — unchanged through time
  • Tagalog: lagian — unchanged through time
  • Tagalog: maligo — unchanged through time
  • Turkish: kalıcı — unchanged through time
  • Turkish: sabit — unchanged through time
  • Ukrainian: пості́йний (postíjnyj) — unchanged through time
  • Welsh: cyson — unchanged through time
  • Azerbaijani: mütəmadi — consistently recurring over time
  • Bulgarian: постоянен (postojanen) — consistently recurring over time
  • Bulgarian: непрекъснат (neprekǎsnat) — consistently recurring over time
  • Catalan: constant — consistently recurring over time
  • Finnish: jatkuva — consistently recurring over time
  • Finnish: tasainen — consistently recurring over time
  • Finnish: vakio- — consistently recurring over time
  • French: constant — consistently recurring over time
  • German: regelmäßig — consistently recurring over time
  • German: ständig — consistently recurring over time
  • German: stetig — consistently recurring over time
  • Greek: σταθερός (statherós) — consistently recurring over time
  • Greek: διαρκής (diarkís) — consistently recurring over time
  • Greek: αδιάκοπος (adiákopos) — consistently recurring over time
  • Hindi: सतत (satat) — consistently recurring over time
  • Hungarian: folytonos — consistently recurring over time
  • Indonesian: konstan — consistently recurring over time
  • Ingrian: iänikäin — consistently recurring over time
  • Irish: síoraí — consistently recurring over time
  • Italian: costante — consistently recurring over time
  • Italian: continuo — consistently recurring over time
  • Māori: rite tonu — consistently recurring over time
  • Mauritian Creole: konstan — consistently recurring over time
  • Old English: singal — consistently recurring over time
  • Polish: bezustanny — consistently recurring over time
  • Portuguese: constante — consistently recurring over time
  • Romanian: constant — consistently recurring over time
  • Scottish Gaelic: cunbhalach — consistently recurring over time
  • Spanish: constante — consistently recurring over time
  • Swedish: konstant — consistently recurring over time
  • Tagalog: lagian — consistently recurring over time
  • Tagalog: maligo — consistently recurring over time
  • Azerbaijani: mütəmadi — steady
  • Breton: kendalc'hus — steady
  • Bulgarian: постоянен (postojanen) — steady
  • Bulgarian: неизменен (neizmenen) — steady
  • Bulgarian: верен (veren) — steady
  • Catalan: constant — steady
  • Catalan: ferm — steady
  • Catalan: perseverant — steady
  • Chinese Mandarin: 持久的 (Chíjiǔde) — steady
  • Finnish: vakaa — steady
  • Finnish: muuttumaton — steady
  • French: constant — steady
  • German: konstant — steady
  • German: fest — steady
  • Greek: σταθερός (statherós) — steady
  • Greek: συνεχής (synechís) — steady
  • Hindi: धीर (dhīr) — steady
  • Hindi: स्थिर (sthir) — steady
  • Hungarian: állhatatos — steady
  • Hungarian: kitartó — steady
  • Irish: diongbháilte — steady
  • Italian: costante — steady
  • Polish: stały — steady
  • Portuguese: constante — steady
  • Romanian: constant — steady
  • Romanian: stabil — steady
  • Sanskrit: धीर (dhīra) — steady
  • Scottish Gaelic: cunbhalach — steady
  • Scottish Gaelic: seasmhach — steady
  • Spanish: constante — steady
  • Spanish: perseverante — steady
  • Spanish: constable (disused) — steady
  • Swedish: konstant — steady
  • Azerbaijani: daimi kəmiyyət — that which is permanent or invariable
  • Breton: kendalc'h — that which is permanent or invariable
  • Bulgarian: постоянна величина (postojanna veličina) — that which is permanent or invariable
  • Catalan: constant — that which is permanent or invariable
  • Chinese Mandarin: 常數 /常数 (chángshù) — that which is permanent or invariable
  • Danish: konstant — that which is permanent or invariable
  • Finnish: vakio — that which is permanent or invariable
  • German: Konstante — that which is permanent or invariable
  • German: Fixwert — that which is permanent or invariable
  • Greek: σταθερά (statherá) — that which is permanent or invariable
  • Hindi: स्थिरांक (sthirāṅk) — that which is permanent or invariable
  • Hungarian: állandó — that which is permanent or invariable
  • Hungarian: konstans — that which is permanent or invariable
  • Italian: costante — that which is permanent or invariable
  • Japanese: 定数 (teisū) — that which is permanent or invariable
  • Korean: 변하지 않는 것 (byeonhaji anneun geot) — that which is permanent or invariable
  • Persian: ثابت (sâbet) — that which is permanent or invariable
  • Persian: ماندگار (mândegâr) — that which is permanent or invariable
  • Polish: stała — that which is permanent or invariable
  • Portuguese: constante — that which is permanent or invariable
  • Russian: постоя́нная (postojánnaja) — that which is permanent or invariable
  • Russian: конста́нта (konstánta) — that which is permanent or invariable
  • Serbo-Croatian: postojanost — that which is permanent or invariable
  • Serbo-Croatian: stalnost — that which is permanent or invariable
  • Spanish: constante — that which is permanent or invariable
  • Swedish: konstant — that which is permanent or invariable
  • Ukrainian: ста́ла (stála) — that which is permanent or invariable
  • Ukrainian: конста́нта (konstánta) — that which is permanent or invariable
  • Azerbaijani: daimi kəmiyyət — algebra: quantity that remains fixed
  • Bulgarian: конста́нта (konstánta) — algebra: quantity that remains fixed
  • Catalan: constant — algebra: quantity that remains fixed
  • Chinese Mandarin: 常量 (chángliàng) — algebra: quantity that remains fixed
  • Chinese Mandarin: 常數 /常数 (chángshù) — algebra: quantity that remains fixed
  • Czech: konstanta — algebra: quantity that remains fixed
  • Danish: konstant — algebra: quantity that remains fixed
  • Finnish: vakio — algebra: quantity that remains fixed
  • French: constante — algebra: quantity that remains fixed
  • German: Konstante — algebra: quantity that remains fixed
  • Greek: σταθερά (statherá) — algebra: quantity that remains fixed
  • Hindi: स्थिरांक (sthirāṅk) — algebra: quantity that remains fixed
  • Hindi: नियतांक (niytāṅk) — algebra: quantity that remains fixed
  • Hungarian: állandó — algebra: quantity that remains fixed
  • Hungarian: konstans — algebra: quantity that remains fixed
  • Indonesian: konstanta — algebra: quantity that remains fixed
  • Italian: costante — algebra: quantity that remains fixed
  • Japanese: 定数 (teisū) — algebra: quantity that remains fixed
  • Khmer: ចំនួនថេរ (cɑmnuən thee) — algebra: quantity that remains fixed
  • Korean: 상수 (sangsu) — algebra: quantity that remains fixed
  • Korean: 정수 (jeongsu) — algebra: quantity that remains fixed
  • Malay: pemalar — algebra: quantity that remains fixed
  • Malay: angkatap — algebra: quantity that remains fixed
  • Māori: tau pūmau — algebra: quantity that remains fixed
  • Persian: ثابت (sâbet) — algebra: quantity that remains fixed
  • Polish: stała — algebra: quantity that remains fixed
  • Portuguese: constante — algebra: quantity that remains fixed
  • Russian: постоя́нная (postojánnaja) — algebra: quantity that remains fixed
  • Russian: конста́нта (konstánta) — algebra: quantity that remains fixed
  • Spanish: constante — algebra: quantity that remains fixed
  • Swedish: konstant — algebra: quantity that remains fixed
  • Tagalog: lagiin — algebra: quantity that remains fixed
  • Thai: ค่าคงที่ (kâa-kong-tîi) — algebra: quantity that remains fixed
  • Thai: ค่าคงตัว (kâa-kong-dtuua) — algebra: quantity that remains fixed
  • Vietnamese: hằng số — algebra: quantity that remains fixed
  • Vietnamese: hằng — algebra: quantity that remains fixed
  • Bulgarian: константа (konstanta) — science: property that does not change
  • Danish: konstant — science: property that does not change
  • Finnish: vakio — science: property that does not change
  • Georgian: მუდმივა (mudmiva) — science: property that does not change
  • German: Konstante — science: property that does not change
  • Greek: σταθερά (statherá) — science: property that does not change
  • Hindi: नियतांक (niytāṅk) — science: property that does not change
  • Hungarian: állandó — science: property that does not change
  • Hungarian: konstans — science: property that does not change
  • Italian: costante — science: property that does not change
  • Japanese: 定数 (teisū) — science: property that does not change
  • Persian: ثابت (sâbet) — science: property that does not change
  • Polish: stała — science: property that does not change
  • Portuguese: constante — science: property that does not change
  • Russian: постоя́нная (postojánnaja) — science: property that does not change
  • Swedish: konstant — science: property that does not change
  • Tagalog: lagiin — science: property that does not change
  • Thai: ค่าคงที่ (kâa-kong-tîi) — science: property that does not change
  • Thai: ค่าคงตัว (kâa-kong-dtuua) — science: property that does not change
  • Turkish: sabit — science: property that does not change
  • Vietnamese: hằng số — science: property that does not change
  • Welsh: cysonyn — science: property that does not change
  • Bulgarian: константа (konstanta) — identifier that is bound to an invariant value
  • Czech: konstanta — identifier that is bound to an invariant value
  • Esperanto: konstanto — identifier that is bound to an invariant value
  • Finnish: vakio — identifier that is bound to an invariant value
  • French: constante — identifier that is bound to an invariant value
  • German: Konstante — identifier that is bound to an invariant value
  • Greek: σταθερά (statherá) — identifier that is bound to an invariant value
  • Hungarian: állandó — identifier that is bound to an invariant value
  • Hungarian: konstans — identifier that is bound to an invariant value
  • Indonesian: konstanta — identifier that is bound to an invariant value
  • Italian: costante — identifier that is bound to an invariant value
  • Persian: ثابت (sâbet) — identifier that is bound to an invariant value
  • Polish: stała — identifier that is bound to an invariant value
  • Portuguese: constante — identifier that is bound to an invariant value
  • Serbo-Croatian: konstanta — identifier that is bound to an invariant value
  • Spanish: constante — identifier that is bound to an invariant value
  • Swedish: konstant — identifier that is bound to an invariant value
  • Tagalog: lagiin — identifier that is bound to an invariant value
Real reading context

constant in complete knowledge articles