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INFANTRY Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition Definition Did you know? Example Sentences Word History Entries Near Cite this Entry Citation Kids Definition Kids More from M-W Show more Show more Citation Kids More from M-W Save Word To save this word, you'll need to log in. Log In infantry noun in·​fan·​try ˈin-fən-trē plural infantries Synonyms of infantry Simple Definition A Simple Definition is available from our Learner's Dictionary to help you understand the meaning faster. 1 a : soldiers trained, armed, and equipped to fight on foot b : a branch of an army composed of these soldiers 2 : an infantry regiment or division Did you know? The Italian word fante (from Latin infans, “infant, child”) originally meant “child,” later “youth, boy,” and then “servant.” In the 14th century, fante also took on the sense “foot soldier.” In Renaissance times, the fanteria, foot soldiers collectively, became a significant branch of arms, and the Italian word infanteria, was borrowed into English in the 1500s. Examples of infantry in a Sentence He joined the infantry after leaving school. Recent Examples on the Web Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback . Marcoulier has served in the Army since July 2023 and is an infantry soldier assigned to the 3rd Brigade Combat Team, 10th Mountain Division, according to the military. — Corky Siemaszko, NBC news , 30 Apr. 2026 At the end of the day, this means that an infantry squad can simply swap magazines and suddenly be able to lay down a lead blizzard against incoming drones. — David Szondy april 19, New Atlas , 19 Apr. 2026 After discovering that the infantry is mounting an attack on Southern forces, Henry considers the chance to clear his name and finally fight for his country. — Declan Gallagher, Entertainment Weekly , 11 Apr. 2026 The United States Army is moving closer to fielding its next-generation infantry fighting vehicle, as American Rheinmetall revealed fresh details about the Lynx XM30 while the Pentagon prepares a $547 million procurement request for fiscal year 2027. — Sujita Sinha, Interesting Engineering , 9 Apr. 2026 See All Example Sentences for infantry Word History Etymology Middle French & Old Italian; Middle French infanterie , from Old Italian infanteria , from infante boy, foot soldier, from Latin infant-, infans First Known Use 1579, in the meaning defined at sense 1a Time Traveler The first known use of infantry was in 1579 See more words from the same year Browse Nearby Words infant mortality infantry infantryman See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Infantry.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/infantry. Accessed 6 May. 2026. Copy Citation Kids Definition infantry noun in·​fan·​try ˈin-fən-trē plural infantries : a branch of an army made up of soldiers trained, armed, and equipped to fight on foot Etymology from early French infanterie and early Italian infanteria, both meaning "infantry," from early Italian infante "infant, boy, foot soldier," from Latin infans "infant" Word Origin In the Middle Ages in France, a young soldier from a good family who was not yet a knight was called enfant, which means "child." Likewise, in Italy a soldier moving on foot behind a knight riding a horse was an infante. Later, Italian foot soldiers as a group became known as infanteria, which was borrowed into French as infanterie and into English as infantry. More from Merriam-Webster on infantry Thesaurus: All synonyms and antonyms for infantry Nglish: Translation of infantry for Spanish Speakers Britannica.com: Encyclopedia article about infantry Last Updated: 1 May 2026 - Updated example sentences Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged More from Merriam-Webster Word of the Day flamboyant See Definitions and Examples » Get Word of the Day daily email! Popular in Grammar & Usage See More More Commonly Mispronounced Words Regarding the Incorrect Use of 'Decimate' 5 Verbal Slip Ups and Language Mistakes Is that lie 'bald-faced' or 'bold-faced'? 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