adj.
Pronunciation: ( ˌ )in- ' s ā n
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 \ - ' s ā n-n ə s \ noun