Definition of lunatic adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈluːnətɪk//
; NAmE NAmE//ˈluːnətɪk//
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  • crazy, ridiculous or extremely stupid lunatic ideas a lunatic smile
  • Idioms
    the lunatic fringe noun
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    [singular + singular or plural verb] (disapproving) those members of a political or other group whose views are considered to be very extreme and crazy They stressed that only the lunatic fringe of the movement was involved in the incident.
    See the Oxford Advanced American Dictionary entry: lunatic