insaneadjective
uk/ɪnˈseɪn/us/ɪnˈseɪn/C2 mentally ill:
For the last ten years of his life he was clinically insane.
informal I sometimes think I'm going insane (= I feel very confused).
C1 extremely unreasonable or stupid:
It would be insane not to take advantage of this opportunity.
Thesaurus: synonyms and related words
Of unsound mind
- around the bend idiom
- bat
- batshit
- battle-scarred
- beside
- crackers
- disturbed
- fruitcake
- gaga
- loon
- lose
- mad
- maniac
- nutcase
- off your trolley idiom
- psychopath
- schizo
- screwy
- trolley
- unhinged
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You can also find related words, phrases, and synonyms in the topics:
Stupid and silly
insanenoun [ plural ]
uk/ɪnˈseɪn/us/ɪnˈseɪn/the insane
mentally ill people:
a hospital for the criminally insane
Thesaurus: synonyms and related words
Of unsound mind
- around the bend idiom
- bat
- batshit
- battle-scarred
- beside
- crackers
- disturbed
- fruitcake
- gaga
- loon
- lose
- mad
- maniac
- nutcase
- off your trolley idiom
- psychopath
- schizo
- screwy
- trolley
- unhinged
See more results »