cais·​son | \ ˈkā-ˌsän How to pronounce caisson (audio) , -sᵊn, British also kə-ˈsün \

Definition of caisson

1a : a chest to hold ammunition
b : a usually 2-wheeled vehicle for artillery ammunition attachable to a horse-drawn limber also : a limber with its attached caisson
2a : a watertight chamber used in construction work under water or as a foundation
b : a hollow floating box or a boat used as a floodgate for a dock or basin

Illustration of caisson

Illustration of caisson

caisson 1b

Examples of caisson in a Sentence

Recent Examples on the Web Recently, crews completed drilling 3-foot caissons into the bedrock and installing Geofoam behind the new retaining wall. Jennifer Rios, The Denver Post, "U.S. 36 reconstruction creeps closer to finish," 22 Sep. 2019 Two years ago on our visit, a detachment from the Old Guard–the ceremonial troops who work at Arlington–was lined up in formation behind a riderless horse and caisson. Elliot Ackerman, Time, "Why Bringing Back the Draft Could Stop America’s Forever Wars," 10 Oct. 2019 His coffin was loaded on a caisson, a riderless horse trailing behind, just like that day with my daughter. Elliot Ackerman, Time, "Why Bringing Back the Draft Could Stop America’s Forever Wars," 10 Oct. 2019 Crews have drilled a series of caissons down into bedrock and placed 6,000 blocks of geofoam, measuring slightly more than 25,000 cubic yards in volume, as a substitute for dirt. Jon Murray, The Denver Post, "U.S. 36 eastbound lanes will reopen next week — less than 3 months after highway collapse," 27 Sep. 2019 As was one of the first soldiers to arrive, his job was to deploy concrete caissons that would form a temporary harbor to help soldiers rapidly load cargo onto the beach. Adam Beam, The Seattle Times, "100-year-old WWII veteran awarded French Legion of Honor," 19 Nov. 2018 Construction began in June 2007 and by the following year, a circular hole 76-feet deep and 110 feet across had been dug, surrounded by caissons to support what was supposed to be the skyscraper’s concrete core. Bill Ruthhart,, "Exclusive: Two soaring towers planned for long-languishing Chicago Spire site along Lake Shore Drive," 11 May 2018 Items range from medals, buttons, insignia and signet rings to 18th- and 19th-century cannons and caissons and more than 100 military flags. Meg Jones, Milwaukee Journal Sentinel, "Wisconsin's attic is moving — Wisconsin Historical Society and Wisconsin Veterans Museum move collections," 20 Apr. 2018 Caro: So the caisson is pulled up to the front of White House. Bob Schieffer, CBS News, "The assassination of JFK: As it happened," 26 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'caisson.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of caisson

circa 1702, in the meaning defined at sense 1a

History and Etymology for caisson

French, from Middle French, from Old Occitan, from caissa chest, from Latin capsa — more at case

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Time Traveler for caisson

Time Traveler

The first known use of caisson was circa 1702

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Cite this Entry

“Caisson.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2021.

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