le·gion (lē'jən)
n.

1. The major unit of the Roman army consisting of 3,000 to 6,000 infantry troops and 100 to 200 cavalry troops.
2. A large military unit trained for combat; an army.
3. A large number; a multitude. See synonyms at multitude.
4. often Legion A national organization of former members of the armed forces.

adj.
Constituting a large number; multitudinous: Her admirers were legion. His mistakes were legion.

[Middle English legioun, from Old French legion, from Latin legiō, legiōn-, from legere, to gather.]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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