magnumadjectivecommon nouncommon nounEtymologyexpandfrom the Latin adjective magnus in its neuter form magnum ('great').Definitions1. Refers to ammunition with a high powder charge and greater power than standard cartridges.armementexpandJe n'utilise jamais de munitions magnums, c'est trop puissant pour moi.2. Refers to a firearm (pistol, rifle) designed to fire such ammunition.metonymyexpandIl m'a proposé un pistolet magnum.Translationsenglish:magnum