imaginary

(s) not based on fact; unreal
- the falsehood about some fanciful secret treaties - F.D.Roosevelt
- a small child's imaginary friends
- to create a notional world for oneself
notional, fanciful,

Nouns

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

Synonyms

notional fanciful complex number complex quantity imaginary number

Words of close approximity

imaginary being imaginary creature imaginary number imaginary part imaginary part of a complex number imaginary place