From The Collaborative International Dictionary of English v.0.44 [gcide]:
Idiotic \Id'i*ot"ic\, Idiotical \Id'i*ot"ic*al\, adjective [L. idioticus ignorant, Gr. ?: cf. F. idiotique. See {Idiot}.]
1. Common; simple. [Obs.] --Blackwall.
2. Pertaining to, or like, an idiot; characterized by idiocy; foolish; fatuous; as, an idiotic person, speech, laugh, or action.
From WordNet (r) 2.0 [wn]:
adjective
1: insanely irresponsible; "an idiotic idea" [syn: {crackbrained}]
2: completely devoid of wisdom or good sense; "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}, {laughable}, {ludicrous}, {nonsensical}, {preposterous}, {ridiculous}]
3: having a mental age of three to seven years [syn: {imbecile}, {imbecilic}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
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
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