Main Entry: in·sane

Pronunciation: \(ˌ)in-ˈsān\

Function: adjective

Etymology: Latin insanus, from in- + sanus sane

Date: circa 1550

1 : mentally disordered : exhibiting insanity
2 : used by, typical of, or intended for insane persons <an insane asylum>
3 : absurd <an insane scheme for making money>
4 : extreme 1

— in·sane·ly adverb

— in·sane·ness \-ˈsān-nəs\ noun