noun, plural courts-martial, court-martials.
a court consisting of military or naval personnel appointed by a commander to try charges of offenses by soldiers, sailors, etc., against military or naval law.
a trial by such a court.
a conviction by such a court: He lost his privileges because of his court-martial.
a session of such a court: He attended the court-martial this morning.
verb (used with object), court-martialed, court-martialing or (especially British) court-martialled, court-martialling.
to arraign and try by court-martial.
1565–75; earlier martial court