Meaning of the word insane in English

What does insane mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

insane

US /ɪnˈseɪn/

UK /ɪnˈseɪn/

in a state of mind which prevents normal perception, behavior, or social interaction; seriously mentally ill.

Example:

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The stress of the job almost drove him insane.

•

He was declared legally insane and committed to a mental institution.

Synonym:

mad crazy deranged lunatic unhinged

extremely foolish or unreasonable.

Example:

•

It's insane to drive without a seatbelt.

•

The prices they are charging are absolutely insane.

Synonym:

foolish absurd ridiculous preposterous senseless

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Related Word:

insanity insanely