insanity plea

/ɪnˌsænədi pli/
IPA guide

Definitions of insanity plea
  1. noun
    (criminal law) a plea in which the defendant claims innocence due to mental incompetence at the time
    synonyms: plea of insanity
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    type of:
    plea
    (law) a defendant's answer by a factual matter (as distinguished from a demurrer)
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