Military. a boat or some other floating structure used as one of the supports for a temporary bridge over a river.
a float for a derrick, landing stage, etc.
Nautical. a float for raising a sunken or deeply laden vessel in the water; a camel or caisson.
a seaplane float.
- Also pon·ton [pon-tn]. /ˈpɒn tn/.
Other definitions for pontoon (2 of 2)
the card game twenty-one.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use pontoon in a sentence
Detectives and city workers found the remains while they were aboard an amphibious vehicle with pontoons.Shannan Gilbert Body Likely Found, New York Police Say | Christine Pelisek | December 13, 2011 | THE DAILY BEAST
"Floating" bridges are roadways carried on pontoons moored in a stream.
Floating Bridges, the roadway being carried on pontoons moored in the stream.
Others carried a great number of small collapsible boats, which are used as pontoons in crossing rivers.Ways of War and Peace | Delia Austrian
Engineers hurried up with pontoons, strung them across the Appomattox, and Grant began the pursuit.The Boys of '61 | Charles Carleton Coffin.
Following the shelling of Fredericksburg, on December 11th, the Union army began to cross on pontoons.Historic Fredericksburg | John T. Goolrick
British Dictionary definitions for pontoon (1 of 2)
a watertight float or vessel used where buoyancy is required in water, as in supporting a bridge, in salvage work, or where a temporary or mobile structure is required in military operations
(as modifier): a pontoon bridge
nautical a float, often inflatable, for raising a vessel in the water
British Dictionary definitions for pontoon (2 of 2)
Also called: (esp US) twenty-one, vingt-et-un a gambling game in which players try to obtain card combinations worth 21 points
(in this game) the combination of an ace with a ten or court card when dealt to a player as his first two cards
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012