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
Standard Lemma guide
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.
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adj
Existing only in the imagination.
Definition source: English Wiktionary via Wiktextract
Synonyms: none provided
Antonyms: none provided
adj
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.
Synonyms: none provided
Antonyms: none provided
noun
Imagination; fancy.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
An imaginary number.
Definition source: English Wiktionary via Wiktextract
Usage: countable
Topics: mathematics, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
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.
Synonyms: none provided
Antonyms: none provided
adjective satellite
not based on fact; unreal- F.D.Roosevelt
Definition source: Princeton WordNet 3.0
Synonyms: fanciful, notional
Antonyms: none provided
noun
(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.
Synonyms: complex number, complex quantity, imaginary number
Antonyms: none provided
Broader terms: number
Narrower terms: complex conjugate, real number, real, pure imaginary number
History
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
129 source translations are retained for this English entry.