[mass noun]mental illness marked by periods of great excitement or euphoria, delusions, and overactivity 躁狂;疯狂 ■[count noun]an excessive enthusiasm or desire; an obsession 癖好,着迷 he had a mania for automobiles. 他对汽车非常着迷。
语源
late Middle English: via late Latin from Greek, literally madness', from mainesthai 'be mad'