Definitions
1.nounThe major unit or division of the Roman army, usually comprising 3000 to 6000 infantry soldiers and 100 to 200 cavalry troops.
2.nounA combined arms major military unit featuring cavalry, infantry, and artillery
3.nounA large military or semi-military unit trained for combat; any military force; an army, regiment; an armed, organized and assembled militia.
4.noun(often Legion or the Legion) A national organization or association of former servicemen, such as the American Legion.
5.nounA large number of people; a multitude.
6.noun(often plural) A great number.
7.nounA group of orders inferior to a class; in scientific classification, a term occasionally used to express an assemblage of objects intermediate between an order and a class.
8.verbTo form into legions.
9.adjectiveNumerous; vast; very great in number"Russia’s labor and capital resources are woefully inadequate to overcome the state’s needs and vulnerabilities, which are legion."