pontoon

1 of 2

noun (1)

pon·​toon pän-ˈtün How to pronounce pontoon (audio)
Synonyms of pontoonnext
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

pontoon

2 of 2

noun (2)

British

Examples of pontoon in a Sentence

Recent Examples on the Web
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Noun
For something with a little more oomph, local marinas offer boat rentals ranging from pontoons to deck boats. Beth Luberecki, USA Today, 30 June 2026 While some soon-to-be-retirees are called to the beach or the mountains, others are drawn to lake living and all its perks, like watching sunsets on the dock, grilling outside, and taking the pontoon boat out for daily cruises. Lydia Mansel, Travel + Leisure, 28 June 2026 Captain An Electric Boat Around Morro Bay Estero Adventures rents quiet electric pontoon boats that visitors operate themselves. David Hochman, Forbes.com, 26 June 2026 But nature is the real reason people step on his pontoon. John Lauritsen, CBS News, 25 June 2026 See All Example Sentences for pontoon

Word History

Etymology

Noun (1)

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

Noun (2)

perhaps alteration of vingt-et-un

First Known Use

Noun (1)

1676, in the meaning defined at sense 1

Noun (2)

circa 1917, in the meaning defined above

Time Traveler
The first known use of pontoon was in 1676

Browse Nearby Words

Cite this Entry

“Pontoon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pontoon. Accessed 4 Jul. 2026.

Kids Definition

pontoon

noun
pon·​toon
pän-ˈtün
1
: a flat-bottomed boat
2
: a float used in building a floating bridge
3
: a float of an airplane
Etymology

Noun

from French ponton "a floating bridge, punt," from Latin ponton-, ponto (same meaning), from pont-, pons "bridge" — related to punt entry 1

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