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
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.