The definition of a legion is an army or other large number of people.
(noun)See legion in Webster's New World College Dictionary
noun
Origin: OFr < L legio < legere, to choose: see logic
adjective
See legion in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English legioun
Origin: , from Old French legion
Origin: , from Latin legiō, legiōn-
Origin: , from legere, to gather; see leg- in Indo-European roots
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