1. 1. A large body of people organized and trained for land warfare.
   2. often Army The entire military land forces of a country.
   3. A tactical and administrative military unit consisting of a headquarters, two or more corps, and auxiliary forces.
2. A large group of people organized for a specific cause: the construction army that built the Panama Canal.
3. A multitude; a host: An army of waiters served at the banquet. See synonyms at multitude.

[Middle English armee, from Old French, from Medieval Latin armāta, from Latin, feminine past participle of armāre, to arm, from arma, arms.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.