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Definitions for: Insane [adj] afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
[adj] very foolish; "harebrained ideas"; "took insane risks behind the wheel"; "a completely mad scheme to build a bridge between two mountains"
Webster (1913) Definition: In*sane", a. [L. insanus. See In- not, and Sane.]
1. Exhibiting unsoundness or disorded of mind; not sane; mad;
deranged in mind; delirious; distracted. See Insanity,
2.
2. Used by, or appropriated to, insane persons; as, an insane
hospital.
3. Causing insanity or madness. [R.]
Or have we eaten on the insaneroot That takes the
reason prisoner ? --Shak.
4. Characterized by insanity or the utmost folly; chimerical;
unpractical; as, an insane plan, attempt, etc.
I know not which was the insane measure. --Southey.
Synonyms: amok, amuck, around the bend, balmy, barmy, bats, batty, berserk, bonkers, brainsick, buggy, certifiable, certified, crackbrained, cracked, crackers, crazed, crazy, daft, demented, demoniac, demoniacal, deranged, distracted, disturbed, dotty, fey, foolish, fruity, half-crazed, harebrained, haywire, hebephrenic, idiotic, kookie, kooky, loco, loony, loopy, lunatic, mad, maniac(p), maniacal, manic-depressive, maniclike, mentally ill, moonstruck, non compos mentis(p), noncompos mentis(p), nuts, nutty, of unsound mind(p), paranoid, possessed(p), psychopathic, psychopathologic, psychopathological, psychotic, raving, raving mad, round the bend, schizophrenic, screw-loose, screwy, sick, touched(p), unbalanced, unhinged, unsound, unstable, wacky, whacky, wild
Antonyms: sane
See Also: irrational, unreasonable
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