spon·​son | \ ˈspän(t)-sən How to pronounce sponson (audio) \

Definition of sponson

1a : a projection (such as a gun platform) from the side of a ship or a tank
b : an air chamber along a watercraft (such as a canoe) to increase stability and buoyancy
2 : a light air-filled structure or a winglike part protruding from the hull of a seaplane to steady it on water

Examples of sponson in a Sentence

Recent Examples on the Web That will allow salvage crews to gradually lift the ship one deck at a time, as water is pumped out and compressed air pumped in to some 30 sponsons attached to its side. Barbara Peterson, Popular Mechanics, 14 July 2014 Jones, a veteran boat racer himself, points out that the only original part of the boat are the sponsons. Nathan Joyce, The Seattle Times, 5 Aug. 2017 The boats came in all shapes and sizes — like the 10-horsepower shovel nose and the pickle fork with two sponsons jutting out front. Hasan Dudar, Detroit Free Press, 15 July 2017 Runabouts are boats with a hull that resembles that of a rowboat, and hydroplanes are faster and have sponsons that reduce surface area, according to show organizer Ed Zaleski, who was displaying his 1969 runabout named Challenger. Hasan Dudar, Detroit Free Press, 15 July 2017

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

First Known Use of sponson

1835, in the meaning defined at sense 1a

History and Etymology for sponson

perhaps by shortening & alteration from expansion

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Time Traveler for sponson

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The first known use of sponson was in 1835

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Cite this Entry

“Sponson.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sponson. Accessed 13 Aug. 2022.

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