Law. A wrongful act or omission; spec. a misdemeanour or failure of duty by a public official. Now rare except in sense 1b.

Misconduct, misdemeanour; an instance of this.

Law. An offence not involving forfeiture of property and thus regarded as less serious than a felony. Now chiefly U.S. (historical in British use).

= misprision, n.1

Law. A transgression, trespass; spec. the wrongful exercise of lawful authority or the improper performance of a lawful act.

Law. Evildoing, illegal action; an unlawful act; spec. official misconduct by a public servant.

Misdemeanour, misconduct; an instance of this.