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Of, relating to, or induced by a mental disorder.
(Psychiatry) relating to or caused by insanity; crazy; mad
insane; crazy; mad.
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|Adj.||1.||brainsick - affected with madness or insanity; "a man who had gone mad"|
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
Afflicted with or exhibiting irrationality and mental unsoundness:
crazy, daft, demented, disordered, distraught, dotty, insane, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, off, touched, unbalanced, unsound, wrong.
Chiefly British: crackers.
Law: non compos mentis.