army

noun

ar·​my ˈär-mē 

plural armies

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

Synonyms

• array
• battalion
• host
• legion

Examples of army in a Sentence

the armies of Alexander the Great

He left home and joined the army after he graduated from high school.

The company employs an army of lawyers to handle its legal affairs.

They sent in a whole army of trained technicians.

The organization was founded by a dedicated army of volunteers.

Recent Examples on the Web

For several weeks, fighting has intensified between the army and the RSF as government troops push to reclaim territories occupied by the militia. —Nimi Princewill, CNN Money, 16 Apr. 2025

But even Russia’s huge army cannot survive this sort of attrition indefinitely, and Birds of Magyar’s numbers show just how well Ukraine can fight even without foreign weapons. Follow me on Twitter. —David Hambling, Forbes.com, 16 Apr. 2025

The conference, co-hosted by the U.K., France and Germany, took place without the main protagonists - the Sudanese army and the RSF. —Emmanuel Akinwotu, NPR, 15 Apr. 2025

His own soccer career had come to an end in 2011 when he was badly wounded in a firefight between the army and Islamist militants. —Mohamed Sheikh Nor, Christian Science Monitor, 15 Apr. 2025

Word History

Etymology

Middle English armee, armye "host of armed men, naval fleet, military expedition," borrowed from Anglo-French armé, armee, from armer "to arm entry 2" + -ee, suffix of action or result (going back to Vulgar Latin *-āta, noun derivative from feminine of Latin -ātus, past participle ending of Latin first-conjugation verbs)

Note: Compare Spanish armada "military force, fleet of warships"—see armada.

First Known Use

circa 1522, in the meaning defined at sense 1a

Phrases Containing army

• army ant
• general of the army
• sergeant major of the army
• standing army

Kids Definition

army

noun

ar·​my ˈär-mē 

plural armies

1

a

: a large body of men and women organized for land warfare

b

often capitalized : the complete military organization of a nation for land warfare

2

: a great number of persons or things

3

: a body of persons organized to promote an idea

Etymology

Middle English armee "army," from early French armee (same meaning), derived from Latin arma "weapons"