[le.gion] n [ME, fr. OF, fr. L legion-, legio, fr. legere to gather--more at legend] (13c) 1: the principal unit of the Roman army comprising 3000 to 6000 foot soldiers with cavalry
2: a large military force; esp: army 1a
3: a very large number: multitude
4: a national association of ex-servicemen
[2]legion adj (1678): many, numerous "the problems are ~"