magnumadjectivecommon nouncommon nounEtymologyexpandfrom the Latin adjective magnus in its neuter form magnum ("large").Definitions1. Magnum ammunition.expandPour mon arme, j'utilise des magnums.2. Weapon firing this type of ammunition.expandL'homme tira un magnum de sa poche ; ses intentions étaient claires.3. Large champagne bottle of about one and a half liters.œnologieexpand4. Large bottle whose capacity is generally twice that of a regular bottle, i.e. 1.5 to 2 liters.by extensionexpandIl ouvrit le sommier, en ressortit un magnum de blanquette de Die. Le bouchon vola. Il but au goulot.PluralmagnumsTranslationsenglish:magnum