magnum
US /ˈmæɡ.nəm/
UK /ˈmæɡ.nəm/
1.
a large bottle for wine or liquor, typically one holding 1.5 liters (equivalent to two standard bottles).
:
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They celebrated with a magnum of champagne.
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He ordered a magnum of his favorite red wine.
2.
a pistol or revolver that fires cartridges of a caliber greater than .38 inch, or a cartridge of this type.
:
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The detective carried a powerful .44 magnum.
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He loaded the magnum with fresh cartridges.