1. insane, crazy, crazed, mad, lunatic, lunatical, deranged; of unsound mind, Latin, non compos mentis. mentally ill; psychotic, schizophrenic, Sl. schizo; daft, Inf. daffy, unbalanced, touched, Inf. unglued, Inf. half-baked, Brit. Sl. bonkers, unhinged, distracted; dazed, moon-struck, possessed, infatuated; odd, peculiar, queer, bizarre, Chiefly Brit. Inf. potty, Inf. dotty, Inf. crackpot; brainsick, Sl. kooky, Sl. meshuga; All Sl. balmy, dippy, batty, bats, cuckoo, buggy, bughouse, bugs, screwy, wacky, wacko, goofy, loony, squirrelly, bananas, nuts, nutty, nutty as a fruitcake.
2. out of one's head or mind or senses or wits, Scot. redwood, Sl. loco, mad as a hatter, mad as a March hare, far-gone, stark raving mad; not all there, not quite right, not right upstairs; Inf. out in left field, Sl. in outer space, Sl. in orbit, Inf. off the wall; Inf. cracked, Inf. mental, Sl. off one's rocker, Sl. out of one's tree, Sl. off one's trolley, Brit. Sl. off one's chump; All Sl. have bats in one's belfry, have a few buttons missing, have a few loose screws.
3. maniacal, hysterical, madding, Archaic. wood, delirious; frantic, frenzied, frenetic; ranting, raving, storming, foaming at the mouth, convulsing; beside oneself, at one's wit's end; out of control, uncontrollable, unrestrainable, corybantic, Inf. haywire, berserk, rabid, wild; violent, stormy, fierce, turbulent.
4. absurd, silly, inane, fatuous, crackbrained,.foolish; irrational, wild-eyed, illogical, unreasonable; senseless, nonsensical, pointless; ridiculous, laughable, ludicrous; asinine, anserine, idiotic, Inf. moronic, im-becilic; childish, puerile, immature.
5. stupid, simple-minded, bird-brained, feebleminded, dull-witted; harebrained, light-minded, lightheaded, giddy; scatterbrained, absent-minded; confused, muddled, bemused.

A Note on the Style of the synonym finder. 2014.


Look at other dictionaries:

  • Demented — De*ment ed, a. [From {Dement}.] Insane; mad; of unsound mind. {De*ment ed*ness}, n. [1913 Webster] …   The Collaborative International Dictionary of English

  • demented — index deranged, lunatic, non compos mentis Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • demented — 1640s, from obsolete DEMENT (Cf. dement) drive mad …   Etymology dictionary

  • demented — *insane, mad, crazy, crazed, deranged, lunatic, maniac, non compos mentis Analogous words: *irrational, unreasonable: delirious, hysterical, frenzied (see corresponding nouns at MANIA) Antonyms: rational …   New Dictionary of Synonyms

  • demented — [adj] crazy, insane bananas*, bemused, crackbrained*, daft, delirious, deranged, distracted, distraught, flipped out*, foolish, frenzied, fruity*, hysterical, idiotic, in the ozone*, lunatic, mad, maniac, maniacal, manic, non compos mentis, nutty …   New thesaurus

  • demented — ► ADJECTIVE 1) suffering from dementia. 2) informal wild and irrational. DERIVATIVES dementedly adverb. ORIGIN from earlier dement «drive mad», from Latin demens insane …   English terms dictionary

  • demented — [dē ment′id, diment′id] adj. [pp. of DEMENT] mentally deranged; insane; mad dementedly adv …   English World dictionary

  • demented — [[t]dɪme̱ntɪd[/t]] 1) ADJ GRADED Someone who is demented has a severe mental illness, especially Alzheimer s disease. [MEDICAL or, OLD FASHIONED] At what point does it become necessary to place a demented person in a nursing home? 2) ADJ GRADED… …   English dictionary

  • demented — de|men|ted [dıˈmentıd] adj [Date: 1600 1700; Origin: dement to drive mad (16 19 centuries), from Latin mens mind ] 1.) crazy or behaving in a very strange way ▪ She was almost demented with grief. 2.) old fashioned suffering from dementia …   Dictionary of contemporary English

  • demented — adjective 1 behaving as if you are crazy, especially because of an upsetting experience: The woman was almost demented with grief. 2 old fashioned suffering from a mental illness …   Longman dictionary of contemporary English

  • demented — adjective many of her patients were too demented to benefit from group therapy Syn: mad, insane, deranged, out of one s mind, crazed, lunatic, unbalanced, unhinged, disturbed, non compos mentis; informal crazy, mental, psycho, off one s rocker,… …   Thesaurus of popular words