A body of foot soldiers and cavalry consisting of different numbers at different periods, -- from about four thousand to about six thousand men, -- the cavalry being about one tenth.
- The major unit of the Roman army consisting of 3,000 to 6,000 infantry troops and 100 to 200 cavalry troops.
- A large military unit trained for combat; an army.
- A large number; a multitude. See Synonyms at multitude.
- A national organization of former members of the armed forces.
- Constituting a large number; multitudinous: Her admirers were legion. His mistakes were legion.