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Meaning of magnum

mag•num

Pronunciation: (mag'num), [key]
— n.
  1. a large wine bottle having a capacity of two ordinary bottles or 1.5 liters (1.6 quarts).
  2. a magnum cartridge or firearm.
—adj.
  1. (of a cartridge) equipped with a larger charge than other cartridges of the same size.
  2. (of a firearm) using such a cartridge.
  3. unusually great in power or size: a magnum spotlight; a magnum dosage.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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