Definition of "army"

army

/ˈɑː.miː/

noun
plural armies
1. A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
  Quotations
  An army never can be commanded or controlled by civilians.
  1858, Prince George, letter to Sir Colin Campbell
  1. Used absolutely for that entire branch of the armed forces.
  2. (often capitalized) Within a vast military, a very large tactical contingent (e.g. a number of divisions).
2. The governmental agency in charge of a state's army.
3. (figuratively) A large group of people working toward the same purpose.
  Quotations
  Mr. Tenev, 33, is now in the hot seat again after Robinhood abruptly curtailed its customers’ trading last week amid a frenzy in stocks such as GameStop, which were driven sky high by an army of online investors.
  2021 February 2, Nathaniel Popper, Kellen Browning, Erin Griffith, “Robinhood’s C.E.O. Is in the Hot Seat”, in The New York Times‎
4. (figuratively) A large group of social animals working toward the same purpose.
5. (figuratively) Any multitude.
6. The military as a whole.