- irrational
- adj1. illogical, meaningless, preposterous, extravagant, unreasonable; incredible, inconceivable, unimaginable, unthinkable; invalid, unsound, unscientific, groundless, fallible; implausible, untenable; doubtful, doubtable, dubitable, questionable.2. absurd, ridiculous, silly, foolish, half-baked, childish, Sl. cockeyed; ludicrous, nonsensical, senseless, amphigoric, Sl. cockamamie; asinine, idiotic, Inf. moronic; pointless, inane, fatuous, stupid; crazy, mad, wild, insane, demented, daft, Inf. daffy, Sl. kooky, Sl. wacky, Sl. cuckoo; peculiar, unusual, anomalous, strange, odd; empty-headed, harebrained, unintelligent, dull-witted, Inf. dumb; vacuous, muddled, mud-dleheaded, addlebrained, half-witted, senseless, confused, bemused; addlepated, brainless; funny, laughable, risible, derisable, humorous, droll, comical, farcical.
A Note on the Style of the synonym finder. 2014.