imaginary[i maj′i ner′ē]
- 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.
A little girl playing an imaginary game.
- existing only in the imagination; fanciful; unreal
- Math. designating or of the square root of a negative quantity, or of a complex number that is not real
Origin of imaginaryClassical Latin imaginarius
- Having existence only in the imagination; unreal.
- Mathematics a. Of or being the coefficient of the imaginary unit in a complex number.b. Of, involving, or being an imaginary number.c. Involving only a complex number of which the real part is zero.
nounpl. i·mag·i·nar·ies Mathematics
(comparative more imaginary, superlative most imaginary)
From Middle French imaginaire, from Latin imāginārius (“relating to images, fancied”), from imāgo.