pontoon

¹ American  

[pon-toon] / pɒnˈtun /

Also ponton

noun

1. Military.  a boat or some other floating structure used as one of the supports for a temporary bridge over a river.

2. a float for a derrick, landing stage, etc.

3. Nautical.  a float for raising a sunken or deeply laden vessel in the water; a camel or caisson.

4. a seaplane float.

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pontoon ² American  

[pon-toon] / pɒnˈtun /

noun

British.

1. the card game twenty-one.

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pontoon ¹ British  

/ pɒnˈtuːn /

noun

1. 1. 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

   2. ( as modifier )

      a pontoon bridge

2. nautical a float, often inflatable, for raising a vessel in the water

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pontoon ² British  

/ pɒnˈtuːn /

noun

1. Also called: twenty-one.   vingt-et-un.  a gambling game in which players try to obtain card combinations worth 21 points

2. (in this game) the combination of an ace with a ten or court card when dealt to a player as his first two cards

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Etymology

Origin of pontoon¹

1585–95; < French ponton < Latin pontōn- (stem of pontō ) flat-bottomed boat, punt

Origin of pontoon²

1915–20; alteration of French vingt-et-un twenty-one

Example Sentences

Agent Savills said it was a unique opportunity to own the vacant island, which is wooded and has its own landing pontoon.

From BBC

"I could smell gas leaking, some gentlemen helped take passengers off a pontoon boat that got stuck in the shore," Ms Brigantino said.

From BBC

Fishing: At Trinity Lake, you can rent a deck boat, pontoon boat or houseboat and try your hand at catching large and smallmouth bass, rainbow trout and Kokanee salmon.

From Los Angeles Times

Fraser came of age on Mercer Island, adjacent to Lake Washington’s eastern shore, across a heavily-trafficked pontoon bridge notorious for fatal crashes.

From Los Angeles Times

They were still bros, by virtue of being young, male and white, but they weren’t fielding invites to keggers in corn fields or weekend pontoon trips.

From Salon