Imaginary meaning

ĭ-măj'ə-nĕr'ē
Having existence only in the imagination; unreal.
adjective
4
1
The definition of imaginary is not real or existing only in the mind, or a square root of a negative number.

An example of something imaginary is an invisible friend.

An example of something imaginary is the square root of negative 16.

adjective
3
1
An imaginary number.
noun
2
0
Existing only in the imagination; fanciful; unreal.
adjective
0
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Designating or of the square root of a negative quantity, or of a complex number that is not real.
adjective
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0
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adjective
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(mathematics) Of a number, having no real part; that part of a complex number which is a multiple of the square root of -1.
adjective
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Imagination; fancy. [from 16th c.]
noun
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(mathematics) An imaginary quantity. [from 18th c.]
noun
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Origin of imaginary

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