Imaginary Definition

ĭ-măjə-nĕrē
imaginaries
adjective
Existing only in the imagination; fanciful; unreal.
Webster's New World
Of or being the coefficient of the imaginary unit in a complex number.
American Heritage
Of, involving, or being an imaginary number.
American Heritage
Designating or of the square root of a negative quantity, or of a complex number that is not real.
Webster's New World
noun
An imaginary number.
American Heritage

Imagination; fancy. [from 16th c.]

Wiktionary
(mathematics) An imaginary quantity. [from 18th c.]
Wiktionary

Other Word Forms of Imaginary

Noun

Singular:
imaginary
Plural:
imaginaries

Origin of Imaginary

  • From Middle French imaginaire, from Latin imāginārius (“relating to images, fancied”), from imāgo.

    From Wiktionary

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