1 A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper officers.
2 A body of persons organized for the advancement of a cause; as, the Blue Ribbon Army.
3 A great number; a vast multitude; a host. An army of good words. Shak. Standing army, a permanent army of professional soldiers, as distinguished from militia or volunteers.