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Synonyms

battalion

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

noun

  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

Other Word Forms

  • subbattalion noun

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.

At one point, he saw Garcia, the battalion chief, and brought up their earlier conversation.

From Los Angeles Times • Mar. 11, 2026

Shpuk joined the Ukrainian army as part of a volunteer battalion in 2014.

From BBC • Feb. 13, 2026

The attack prompted Tinubu to order the deployment of a battalion in the remote village.

From Barron's • Feb. 5, 2026

The sight of the full battalion brings grins to every passerby.

From Salon • Feb. 5, 2026

Old friends could pick him out of a dismissed battalion, so singular was his walk, so indelibly a part of him, and he could change it no more than he could change his blood type.

From "The Great Santini" by Pat Conroy