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battalion

American  
[buh-tal-yuhn] / bəˈtæl jən /

noun

  • battalions
    plural
  1. Military. a ground force unit composed of a headquarters and two or more companies or similar units.

  2. an army in battle array.

  3. Often battalions. a large number of persons or things; force.

    battalions of bureaucrats.


battalion British  
/ bəˈtæljən /

noun

  1. a military unit comprised of three or more companies or formations of similar size

  2. (usually plural) any large array

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Derived Forms

Inflected Forms

Nouns


Etymology

Origin of battalion

1580–90; < Middle French bataillon < Italian battaglione large squadron of soldiers, equivalent to battagli ( a ) battalia ( def. ) + -one augmentative suffix


Explanation

A battalion is a unit of an army. One battalion usually consists of three or more companies and a headquarters. The word battalion sounds a lot like battle, and that's a clue to its meaning: battalions are groups engaged in a battle. Specifically, a battalion is a smaller segment of an army. Within a battalion, there will usually be a headquarters, as well as a few smaller units, which are called companies. The members of a battalion will work closely together, whether they are attacking an enemy or defending a base. Veterans always remember the other soldiers in their battalion.

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Vocabulary lists containing battalion

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Stupnikov named his battalion, and said he was out to inspect surveillance cameras and test the radio connection.

From The Wall Street Journal ● Oct. 16, 2026

He appended his name, rank, location, and battalion and brigade names.

From The Wall Street Journal ● Oct. 16, 2026

A battalion chief ordered crews to remove the hose anyway, The Times reported in October 2025.

From Los Angeles Times ● Oct. 2, 2026

The commander of one battalion is offering troops who sign up for more years of service four days off for the November 19 launch of the highly anticipated video game.

From Barron's ● Aug. 20, 2026

This battalion of heroes ventured out into the stricken city every day without fail.

From "An American Plague: The True and Terrifying Story of the Yellow Fever Epidemic of 1793" by Jim Murphy

U.S. forces in South Korea also maintain two Patriot battalions, in addition to the one in Japan.

From The Wall Street Journal ● Mar. 8, 2026

Today some 40 battalions defend that border, but such a deployment is difficult to maintain over the long haul.

From Los Angeles Times ● Aug. 6, 2024

He said in a speech on Tuesday that he wants the Army to have "battalions of one-way attack drones".

From BBC ● Jul. 24, 2024

The remaining two battalions were operating at a “medium level,” the military said.

From New York Times ● Jun. 17, 2024

When tank battalions approached the Congress, democracy protesters threw up barricades.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

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