/lee"jeuhn/ , n.
1. a division of the Roman army, usually comprising 3000 to 6000 soldiers.
2. a military or semimilitary unit.
3. the Legion .
a. See American Legion .
b. See foreign legion (def. 2).
4. any large group of armed men.
5. any great number of persons or things; multitude.
adj.
6. very great in number: The holy man's faithful followers were legion.
[ 1175-1225; ME legi ( o ) un ( legion- (s. of legio ) picked body of soldiers, equiv. to leg ( ere ) to gather, choose, read + -ion- -ION ]
Syn. 5. throng, mass, host, sea.