insane
/ɪnˈseɪn/ adjective
Forms insaner insanest
- adjective Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
- adjective Used by or relating to insane people. “an insane hospital”
- adjective Causing insanity or madness.
- adjective (informal) Characterized by excess or the utmost folly; ridiculous; impractical. “an insane plan”
- adjective (slang) Extremely good; incredibly amazing. “That guy is insane at FPS games.”
- adjective (informal) Enraged; furious.
Synonyms
5150 bananas barking barking mad buggish buggy bughouse barmy batchy batpoop bats batty bonkers bread baskets cracked crackers cra-cra cray cray-cray crazed harebrained mad
Antonyms
Etymology
From Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”), equivalent to in- + sane.
Webster’s 1913
- adjective Exhibiting unsoundness or disorded of mind; not sane; mad; deranged in mind; delirious; distracted. See Insanity, 2.
- adjective Used by, or appropriated to, insane persons; as, an insane hospital.
Etymology [L. insanus. See In- not, and Sane.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “insane”, CC BY-SA 4.0. Details