Magnum
/mˈæɡnəm/
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Definition
(noun) A bottle containing 1.5 liters of fluid, double the volume of a standard wine bottle.
Sentence Examples
Long Day's Journey into Night is considered to be Eugene O'Neill's magnum opus.
This is probably Tom's magnum opus.
CEFR Practice Quiz
A ____ of champagne is equivalent to two standard bottles and is often used for a large celebration.