American Dictionary

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Definition insane in American English

insane adjective

adjective
/ɪnˈseɪn/
1

very stupid or crazy, especially in a way that is likely to cause serious problems, harm, or injury

Example

It's an insane situation that I can't see any way out of.

Example

You'd be totally insane to see him again.

Synonyms and related words
2

suffering from very severe mental illness so that you cannot be considered legally responsible for your actions. It is usually considered offensive to call someone insane, although this word is still used in some legal or official phrases

Example

He was certified insane in 1998.

Synonyms and related words
3

to make someone very angry or annoyed

Example

Stop making that noise! It's driving me insane!

Definition insane in American English