noun
magnum (cartridge, gun)
Refers to a type of high-powered firearm cartridge or the gun itself. Often used in compound terms like マグナム弾 (magnum round) or マグナムリボルバー (magnum revolver).
彼はマグナム弾を使うハンドガンを好む。
He prefers handguns that use magnum rounds.
noun
magnum (1.5-litre wine bottle)
A large wine bottle holding 1.5 litres, equivalent to two standard bottles. Common in wine shops and restaurants.
パーティー用にワインのマグナムボトルを買った。
I bought a magnum bottle of wine for the party.