Numerous; vast; very great in number

(military, Ancient Rome) The major unit or division of the Roman army, usually comprising 3000 to 6000 infantry soldiers and 100 to 200 cavalry troops.

(transitive) To form into legions.

(US, military) Ellipsis of American Legion.

plural of legion

Formed into a legion or legions; legionary.

present participle of legion

The highest order of merit in France. / The medal awarded for achieving this.

(UK) Alternative form of Legion of Honor

(Buddhism) group of eight Buddhist deities protecting the Dharma