Definition of insane

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insanitary >

in·sane

(

n-s

) KEY

ADJECTIVE:

1. Of, exhibiting, or afflicted with insanity.
2. Characteristic of or associated with persons afflicted with insanity: an insane laugh; insane babbling.
3. Intended for use by such persons: an insane asylum.
Immoderate; wild: insane jealousy.
Very foolish; absurd: took insane risks behind the wheel.

ETYMOLOGY:
Latin nsnus : in-, not ; see in-¹ + snus, sane, healthy

OTHER FORMS:
in·sanely(Adverb), in·saneness(Noun)

Thesaurus: synonyms for insane

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