D defs.my
Entry 3 senses Webster, 1913

Army

/är'mē/ · Ar·my · IPA /ˈɑɹ.mi/
01 n. A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper of…
  1. 1.
    A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper officers.
  2. 2.
    A body of persons organized for the advancement of a cause; as, the Blue Ribbon Army.
  3. 3.
    A great number; a vast multitude; a host.
    “An army of good words.” Shak.
Phrases & compounds
Standing army — a permanent army of professional soldiers, as distinguished from militia or volunteers.