adj. 25B6; adjective MAD, insane, deranged, out of one's mind, crazed, lunatic, unbalanced, unhinged, disturbed, non compos mentis; informal crazy, mental, off one's head, off one's rocker, nutty, round the bend, raving mad, batty, cuckoo, loopy, loony, bananas, screwy, touched, gaga, not all there, out to lunch; Brit. informal barmy, bonkers, crackers, barking, round the twist, off one's trolley, not the full shilling; N. Amer. informal buggy, nutso, squirrelly, wacko.
sane.