US: /ˌɪnˈseɪn/
UK: /ɪnsˈe‍ɪn/

English Vietnamese dictionary

insane /in'seinnis/
  • tính từ
    • điên, điên cuồng, mất trí

Advanced English dictionary

+ adjective
1 seriously mentally ill and unable to live in normal society: Doctors certified him as insane. + The prisoners were slowly going insane.
Antonym: SANE
2 (the insane) noun [pl.] people who are insane: a hospital for the insane
3 (informal) very stupid, crazy or dangerous: I must have been insane to agree to the idea.
See also - INSANITY
insanely adverb: He is insanely jealous.
Idioms see DRIVE v.

Thesaurus dictionary

1 mad, demented, psychotic, schizophrenic, schizoid, non compos mentis, manic, maniacal, lunatic, deranged, unbalanced, psychoneurotic, neurotic, eccentric, crazy, of unsound mind, crazed, unhinged, out of one's mind or head, mad as a hatter or a March hare, quirky, Colloq round the bend or twist, off one's rocker or chump, loopy, loony, certifiable, mental, screwy, dotty, cuckoo, not all there, not have all one's marbles, off-the-wall, out of it, Brit potty, Slang daft, nutty (as a fruit cake), nuts, spaced out, spacy, batty, have bats in one's belfry, not right upstairs, barmy (in the crumpet), crackers, have a screw loose, schizo, Brit bonkers, US bugs, bughouse, loco, crazy as a bedbug, (gone) off the deep end, kooky, kinky, out to lunch:
Witney was certified insane and institutionalized. You're insane if you think I am going out on that ledge
2 stupid, dumb, dull, silly, asinine, ridiculous, idiotic, irrational, absurd, fatuous, ludicrous, foolish, nonsensical, irresponsible, reckless, wild, imbecilic, moronic, feeble-minded, hare-brained, addle-pated, addle-brained, scatterbrained, thimble-witted, attocerebral, Brit gormless, Colloq nutty, screwy, crazy:
People in love sometimes do insane things.

Collocation dictionary

1 mentally ill/crazy


be, look | become, go
He later became insane and was confined to an asylum. He went almost insane when he heard that his daughter had died.
| drive sb
You're driving me nearly insane with that noise.
| certify sb, declare sb
In 1975 she was certified clinically insane and sent to a mental hospital.


completely, totally | almost, nearly | a little | dangerously | clinically | criminally
He is criminally insane, unable to stop himself attacking women.

2 very stupid/dangerous


be, seem
It seems insane to cut the budget now.


quite, totally
The whole idea is quite insane.

Concise English dictionary

+afflicted with or characteristic of mental derangement
+very foolish