insane.
Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
Meaning & usage
Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
Used by or relating to insane people.
an insane hospital
an insane asylum
Causing insanity or madness.
Characterized by excess or the utmost folly; ridiculous; impractical.
an insane plan
an insane amount of money
Extremely good; incredibly amazing.
That guy is insane at FPS games.
Enraged; furious.
Where this word comes from
From Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”), equivalent to in- + sane.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.