Main Entry: ar·my

Pronunciation: \ˈär-mē\

Function: noun

Inflected Form(s): plural armies

Etymology: Middle English armee, from Anglo-French, from Medieval Latin armata — more at armada

Date: 14th century

1 a : a large organized body of armed personnel trained for war especially on land b : a unit capable of independent action and consisting usually of a headquarters, two or more corps, and auxiliary troops c often capitalized : the complete military organization of a nation for land warfare
2 : a great multitude <an army of birds>
3 : a body of persons organized to advance a cause