expeditionary

adjective

ex·​pe·​di·​tion·​ary ˌek-spə-ˈdi-shə-ˌner-ē How to pronounce expeditionary (audio)
: of, relating to, or being an expedition
also : sent on military service abroad
an expeditionary force

Examples of expeditionary in a Sentence

Recent Examples on the Web
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The Cuban military, once a formidable expeditionary force during Cold War campaigns in Africa, now struggles with chronic fuel shortages, aging equipment, limited mobility and poor readiness, Pérez said. Antonio María Delgado, Miami Herald, 28 May 2026 On Staten Island the Howes assembled their expeditionary force — 25,000 soldiers and 400 warships and transports — to seize Brooklyn and then eject Washington’s army from Manhattan. Nick Bunker, Washington Post, 22 May 2026 The expansion follows Shield AI’s 2025 unveiling of X-BAT, a vertical takeoff and landing (VTOL) fighter jet platform designed for expeditionary and maritime operations in contested environments. Aman Tripathi, Interesting Engineering, 20 May 2026 More than 10,000 Marines from expeditionary units are now in theater, giving Trump the option to launch limited ground operations, such as seizing a small stretch of coastline or initiating an assault on Kharg Island, the hub of Iran’s oil industry. Los Angeles Times, 2 May 2026 See All Example Sentences for expeditionary

Word History

First Known Use

1817, in the meaning defined above

Time Traveler
The first known use of expeditionary was in 1817

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Cite this Entry

“Expeditionary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/expeditionary. Accessed 6 Jun. 2026.

Kids Definition

expeditionary

adjective
ex·​pe·​di·​tion·​ary ek-spə-ˈdish-ə-ˌner-ē How to pronounce expeditionary (audio)
: sent on military service abroad
an expeditionary force
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