[syn: imbecile, imbecilic, idiotic]
The Collaborative International Dictionary of English v.0.48:
Idiotic \Id`i*ot"ic\, Idiotical \Id`i*ot"ic*al\, a. [L.
idioticus ignorant, Gr. ?: cf. F. idiotique. See Idiot.]
1. Common; simple. [Obs.] --Blackwall.
[1913 Webster]
2. Pertaining to, or like, an idiot; characterized by idiocy;
foolish; fatuous; as, an idiotic person, speech, laugh, or
action.
[1913 Webster]
WordNet (r) 3.0 (2006):
idiotic
adj 1: insanely irresponsible; "an idiotic idea" [syn:
crackbrained, idiotic]
2: incongruous;inviting ridicule; "the absurd excuse that the
dog ate his homework"; "that's a cockeyed idea"; "ask a
nonsensical question and get a nonsensical answer"; "a
contribution so small as to be laughable"; "it is ludicrous
to call a cottage a mansion"; "a preposterous attempt to turn
back the pages of history"; "her conceited assumption of
universal interest in her rather dull children was
ridiculous" [syn: absurd, cockeyed, derisory,
idiotic, laughable, ludicrous, nonsensical,
preposterous, ridiculous]
3: having a mental age of three to seven years [syn: imbecile,
imbecilic, idiotic]
Moby Thesaurus II by Grady Ward, 1.0:
78 Moby Thesaurus words for "idiotic":
apish, arrested, asinine, babbling, backward, batty, befooled,
beguiled, besotted, blithering, brainless, buffoonish, burbling,
cockeyed, crackbrained, cracked, crazy, credulous, cretinistic,
cretinous, daffy, daft, dazed, dithering, dizzy, doting, driveling,
drooling, dumb, fatuitous, fatuous, flaky, fond, fool, foolheaded,
foolish, fuddled, futile, gaga, goofy, gulled, half-baked,
half-witted, imbecile, imbecilic, inane, inept, infatuated, insane,
kooky, loony, mad, maudlin, maundering, mentally defective,
mentally deficient, mentally handicapped, mentally retarded,
mongoloid, moronic, not all there, nutty, retarded, sappy, screwy,
senseless, sentimental, silly, simple, simpleminded, simpletonian,
slobbering, stupid, subnormal, thoughtless, wacky, wet, witless