English Explanatory Dictionary

McNaughton rules

English dictionary entry

Meanings

noun
  1. A test of criminal insanity by which "it must be clearly proved that, at the time of committing the act, the party accused was labouring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act he was doing, or, if he did know it, that he did not know he was doing what was wrong".

Word forms

McNaughton rules M'Naghten rule

Etymology

1843, from the trial of Daniel McNaughton, who shot and murdered Edward Drummond, the Private Secretary to the then British Prime Minister Sir Robert Peel.

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