noun (1)
pon·​toon | \ pän-ˈtün How to pronounce pontoon (audio) \

Definition of pontoon

 (Entry 1 of 2)

1 : a flat-bottomed boat (such as a lighter) especially : a flat-bottomed boat or portable float used in building a floating temporary bridge
2 : a float especially of a seaplane


noun (2)

Definition of pontoon (Entry 2 of 2)

First Known Use of pontoon

Noun (1)

1676, in the meaning defined at sense 1

Noun (2)

circa 1917, in the meaning defined above

History and Etymology for pontoon

Noun (1)

French ponton, from Old French, from Latin ponton-, ponto

Noun (2)

perhaps alteration of vingt-et-un

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Time Traveler for pontoon

Time Traveler

The first known use of pontoon was in 1676

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Cite this Entry

“Pontoon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pontoon. Accessed 19 Feb. 2020.

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More Definitions for pontoon


pon·​toon | \ pän-ˈtün How to pronounce pontoon (audio) \

Kids Definition of pontoon

: a large hollow container filled with air and used to make something (as a boat, plane, or bridge) float

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More from Merriam-Webster on pontoon

Rhyming Dictionary: Words that rhyme with pontoon

Spanish Central: Translation of pontoon

Nglish: Translation of pontoon for Spanish Speakers

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