Definition of sponson
1a : a projection (such as a gun platform) from the side of a ship or a tankb : 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
Recent Examples of sponson from the Web
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.
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.
Origin and Etymology of sponson
perhaps by shortening & alteration from expansion
First Known Use: 1835See Words from the same year
Seen and Heard
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