1. large wine bottle: a wine bottle that holds approximately 1.5 liters, the equivalent of two normal bottles
2. contents of magnum: the volume of liquid contained in a magnum
[Late 18th century. < Latin, a form of magnus "large"]
Word History
The Latin word magnus "great," from which magnum is derived, is also the source of English magnanimous, magnate, magnificent, magnify, magnitude, major, maximum, and mayor.
