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
pontoon
noun (2)Definition of pontoon (Entry 2 of 2)
British
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Merriam-Webster unabridged
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Time Traveler for pontoon
The first known use of pontoon was in 1676
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