n. & adj.
n. 1 a division of 3,000-6,000 men, including a complement of cavalry, in the ancient Roman army. 2 a large organized body. 3 a vast host, multitude, or number.
predic.adj. great in number (his good works have been legion). American Legion (in the US) an association of ex-servicemen formed in 1919. foreign legion a body of foreign volunteers in a modern, esp. French, army. Legion of Honour a French order of distinction founded in 1802. Royal British Legion (in the UK) an association of ex-servicemen (and now women) formed in 1921.
[ ME f. OF f. L legio -onis f. legere choose ]