Standard Lemma guide

imaginary

adj · noun · 7 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.

  • Received-Pronunciation: /ɪˈmæd͡ʒɪnəɹi/
  • Received-Pronunciation: /ɪˈmæd͡ʒɪnɹi/
  • General-American: /ɪˈmæd͡ʒɪˌn(ɛ)ɹi/
  • General-American: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 M AE1 JH AH0 N EH2 R IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Existing only in the imagination.

Definition source: English Wiktionary via Wiktextract

Examples

  • imaginary friend
  • Unicorns are imaginary.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Having no real part; that part of a complex number which is a multiple of √ (called imaginary unit).

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Imagination; fancy.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

An imaginary number.

Definition source: English Wiktionary via Wiktextract

Usage: countable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

The set of values, institutions, laws, and symbols common to a particular social group and the corresponding society through which people imagine their social whole.

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, sciences, social-science, sociology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective satellite

Meaning 6

not based on fact; unreal- F.D.Roosevelt

Definition source: Princeton WordNet 3.0

Examples

  • the falsehood about some fanciful secret treaties
  • a small child's imaginary friends
  • to create a notional world for oneself

Meaning relationships

Synonyms: fanciful, notional

Antonyms: none provided

7

noun

Meaning 7

(mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: complex number, complex quantity, imaginary number

Antonyms: none provided

Broader terms: number

Narrower terms: complex conjugate, real number, real, pure imaginary number

History

Etymology

From Middle English ymaginarie, ymagynary, from Latin imāginārius (“relating to images, fancied”), from imāgō, equivalent to imagine + -ary. The mathematical sense derives from René Descartes's use (of the French imaginaire) in 1637, La Geometrie, to ridicule the notion of regarding non-real roots of polynomials as numbers. Although Descartes' usage was derogatory, the designation stuck even after the concept gained acceptance in the 18th century.

Across languages

Translations

129 source translations are retained for this English entry.

  • Afrikaans: denkbeeldig — existing in the imagination
  • Afrikaans: imaginêr — existing in the imagination
  • Arabic: خِيَّالِيّ (ḵiyyāliyy) — existing in the imagination
  • Aragonese: imachinario — existing in the imagination
  • Armenian: երեւակայական (erewakayakan) — existing in the imagination
  • Asturian: imaxinariu — existing in the imagination
  • Azerbaijani: xəyali — existing in the imagination
  • Azerbaijani: uydurulmuş — existing in the imagination
  • Azerbaijani: uydurma — existing in the imagination
  • Azerbaijani: qondarma — existing in the imagination
  • Belarusian: уя́ўны (ujáwny) — existing in the imagination
  • Belarusian: выабража́льны (vyabražálʹny) — existing in the imagination
  • Belarusian: вы́думаны (výdumany) — existing in the imagination
  • Bengali: কাল্পনিক (kalponik) — existing in the imagination
  • Bulgarian: въобража́ем (vǎobražáem) — existing in the imagination
  • Bulgarian: изми́слен (izmíslen) — existing in the imagination
  • Catalan: imaginari — existing in the imagination
  • Chinese Mandarin: 幻想 (huànxiǎng) — existing in the imagination
  • Czech: pomyslný — existing in the imagination
  • Czech: imaginární — existing in the imagination
  • Danish: imaginær — existing in the imagination
  • Danish: indbildt — existing in the imagination
  • Dutch: denkbeeldig — existing in the imagination
  • Dutch: ingebeeld — existing in the imagination
  • Estonian: imaginaarne — existing in the imagination
  • Finnish: imaginaari- — existing in the imagination
  • Finnish: kuvitteellinen — existing in the imagination
  • French: imaginaire — existing in the imagination
  • Galician: imaxinario — existing in the imagination
  • Georgian: წარმოსახვითი (c̣armosaxviti) — existing in the imagination
  • German: eingebildet — existing in the imagination
  • German: imaginär — existing in the imagination
  • Greek: φανταστικός (fantastikós) — existing in the imagination
  • Ancient Greek: φαντασιώδης (phantasiṓdēs) — existing in the imagination
  • Gujarati: કાલ્પનિક (kālpanik) — existing in the imagination
  • Hawaiian: moeā — existing in the imagination
  • Hebrew: דִּמְיוֹנִי (dimyoní) — existing in the imagination
  • Hindi: काल्पनिक (kālpanik) — existing in the imagination
  • Hungarian: képzeletbeli — existing in the imagination
  • Icelandic: ímyndaður — existing in the imagination
  • Ido: imaginala — existing in the imagination
  • Ido: imaginita — existing in the imagination
  • Ido: fiktiva — existing in the imagination
  • Indonesian: khayalan — existing in the imagination
  • Indonesian: khayal — existing in the imagination
  • Interlingua: imaginari — existing in the imagination
  • Irish: íomháineach — existing in the imagination
  • Irish: samhailteach — existing in the imagination
  • Irish: samhlaithe — existing in the imagination
  • Irish: samhlaitheach — existing in the imagination
  • Irish: taibhriúil — existing in the imagination
  • Italian: immaginario — existing in the imagination
  • Japanese: 架空の (kakū no) — existing in the imagination
  • Japanese: 幻想的な (gensōteki na) — existing in the imagination
  • Kazakh: қиялдағы (qiäldağy) — existing in the imagination
  • Korean: 환상적 (hwansangjeok) — existing in the imagination
  • Korean: 가상적 (gasangjeok) — existing in the imagination
  • Northern Kurdish: aşopî — existing in the imagination
  • Latin: imaginarius — existing in the imagination
  • Latin: phantasticus — existing in the imagination
  • Latvian: iedomāts — existing in the imagination
  • Lithuanian: įsivaizduojamas — existing in the imagination
  • Luxembourgish: imaginär — existing in the imagination
  • Macedonian: имагина́рен (imagináren) — existing in the imagination
  • Macedonian: замислен (zamislen) — existing in the imagination
  • Malayalam: സാങ്കൽപ്പിക (sāṅkalppika) — existing in the imagination
  • Māori: pohewa — existing in the imagination
  • Marathi: काल्पनिक (kālpanik) — existing in the imagination
  • Mirandese: manginário — existing in the imagination
  • Mirandese: eimaginário — existing in the imagination
  • Norwegian Bokmål: tenkt — existing in the imagination
  • Norwegian Bokmål: imaginær — existing in the imagination
  • Norwegian Bokmål: innbilt — existing in the imagination
  • Norwegian Nynorsk: tenkt — existing in the imagination
  • Persian: خیالی (xiyâli) — existing in the imagination
  • Piedmontese: imaginari — existing in the imagination
  • Polish: zmyślony — existing in the imagination
  • Polish: umowny — existing in the imagination
  • Polish: imaginacyjny — existing in the imagination
  • Portuguese: imaginário — existing in the imagination
  • Romanian: imaginar — existing in the imagination
  • Romanian: închipuit — existing in the imagination
  • Russian: вообража́емый (voobražájemyj) — existing in the imagination
  • Russian: мни́мый (mnímyj) — existing in the imagination
  • Russian: вы́мышленный (výmyšlennyj) — existing in the imagination
  • Russian: вы́думанный (výdumannyj) — existing in the imagination
  • Scottish Gaelic: mac-meanmnach — existing in the imagination
  • Serbo-Croatian: и̏магина̄ран — existing in the imagination
  • Serbo-Croatian: ѝзмишљен — existing in the imagination
  • Serbo-Croatian: ȉmagināran — existing in the imagination
  • Serbo-Croatian: ìzmišljen — existing in the imagination
  • Slovak: pomyselný — existing in the imagination
  • Slovak: imaginárny — existing in the imagination
  • Slovene: namišljen — existing in the imagination
  • Slovene: imaginaren — existing in the imagination
  • Slovene: navidezen — existing in the imagination
  • Spanish: imaginario — existing in the imagination
  • Swahili: -a kubuni — existing in the imagination
  • Swedish: imaginär — existing in the imagination
  • Swedish: inbillad — existing in the imagination
  • Tajik: хаёлӣ (xayoli) — existing in the imagination
  • Tamil: கற்பனையனான (kaṟpaṉaiyaṉāṉa) — existing in the imagination
  • Tamil: கற்பனையானது (kaṟpaṉaiyāṉatu) — existing in the imagination
  • Thai: จินตภาพ (jin-dtà-pâap) — existing in the imagination
  • Turkish: sanal — existing in the imagination
  • Turkish: hayalî — existing in the imagination
  • Ukrainian: уя́вний (ujávnyj) — existing in the imagination
  • Ukrainian: ви́гаданий (výhadanyj) — existing in the imagination
  • Welsh: dychmygol — existing in the imagination
  • Afrikaans: imaginêr — non-real part of a complex number
  • Basque: irudikari — non-real part of a complex number
  • Bulgarian: имагине́рен (imaginéren) — non-real part of a complex number
  • Czech: imaginární — non-real part of a complex number
  • Dutch: imaginair — non-real part of a complex number
  • Finnish: imaginaarinen — non-real part of a complex number
  • Finnish: imaginaari- — non-real part of a complex number
  • Galician: imaxinario — non-real part of a complex number
  • German: imaginär — non-real part of a complex number
  • Greek: φανταστικός (fantastikós) — non-real part of a complex number
  • Hungarian: imaginárius — non-real part of a complex number
  • Hungarian: képzetes — non-real part of a complex number
  • Indonesian: imajiner — non-real part of a complex number
  • Latvian: imaginārs — non-real part of a complex number
  • Polish: urojona — non-real part of a complex number
  • Portuguese: imaginário — non-real part of a complex number
  • Russian: мни́мый (mnímyj) — non-real part of a complex number
  • Spanish: imaginario — non-real part of a complex number
  • Swedish: imaginär — non-real part of a complex number
  • Tamil: கற்பனை (kaṟpaṉai) — non-real part of a complex number
Real reading context

imaginary in complete knowledge articles