The definition of a battalion is a large group of soldiers, or a group of combat units.(noun)
An example of a battalion is a group of 20 tanks attacking the same target.
See battalion in Webster's New World College Dictionary
Origin: MFr bataillon < It battaglione < battaglia < VL battalia, battle
See battalion in American Heritage Dictionary 4
Origin: French bataillon
Origin: , from Old French
Origin: , from Italian battaglione
Origin: , augmentative of battaglia
Origin: , from Vulgar Latin *battalia; see battle.
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