Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun imaginary

1 sense of imaginary

Sense 1
complex number, complex quantity, imaginary number, imaginary -- ((mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1)
       => number -- (a concept of quantity involving zero and units; "every number has a unique position in the sequence")

Antonyms of adj imaginary

1 sense of imaginary

Sense 1
fanciful, imaginary, notional -- (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")

INDIRECT (VIA unreal) -> real, existent -- (being or occurring in fact or actuality; having verified existence; not illusory; "real objects"; "real people; not ghosts"; "a film based on real life"; "a real illness"; "real humility"; "Life is real! Life is earnest!"- Longfellow)

Similarity of adj imaginary

1 sense of imaginary

Sense 1
fanciful, imaginary, notional -- (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")
       => unreal (vs. real) -- (lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria; "ghosts and other unreal entities"; "unreal propaganda serving as news")