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Definition of: legion
(lē′jən) noun
1. A division of the ancient Roman army, consisting of ten cohorts of infantry, with an auxiliary force of 300 cavalry: altogether between 4,200 and 6,000 men.
2. One of various other military organizations of other countries.
3. plural Military force.
4. A great number; multitude.
5. Zool. A taxonomic category, no longer used. [<OF legiun <L legio -onis <legere choose, levy an army]
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