Magnum (noun)

1. A large bottle of wine containing 1.5 liters of liquid, equivalent to two standard 750 milliliter bottles.
2. A type of handgun, typically a revolver, with a large caliber.

Origin:

From latin magnum ("large, great"), from maior ("greater"). originally referred to a large wine bottle containing 1.5 liters (1.6 quarts) of liquid, which is the equivalent of two standard 750 milliliter bottles.

Examples:

1. He ordered a magnum of champagne to celebrate his promotion.
2. The magnum was the preferred choice of handgun for many police officers.
3. The magnum revolver was known for its accuracy and power.
4. The magnum bottle of wine was perfect for a large group of people.
5. He opened the magnum of wine to serve at the dinner party.