adjective
1.
Synonyms: fictitious 1, chimerical, fanciful, fictional, fictive, illusory, imaginary, suppositious, supposititious, unreal
Related Word: implausible, incredible, unbelievable; absurd, preposterous; irrational, unreasonable; deceptive, delusive, delusory, misleading
Contrasted words: common, commonplace, everyday, familiar, ordinary; customary, prevailing, universal, usual
2.
conceived or made without reference to reality
their explanation was fantastic
Synonyms: antic, bizarre, grotesque
Related Word: adroit, clever, ingenious; eccentric, erratic, odd, queer, singular, strange; absurd, nonsensical, preposterous, ridiculous
Contrasted words: factual, solid, sound, valid, well-grounded; plausible, reasonable
3.
Synonyms: foolish 2, absurd, ||balmy, crazy, insane, loony, preposterous, silly, unearthly, wacky
4.
Synonyms: monstrous 1, cracking, massive, monumental, mortal, prodigious, stupendous, towering, tremendous
5.
Synonyms: extravagant 1, preposterous, wild