plural pontoons
plural pontoons
Learner's definition of PONTOON
[count]
: a large hollow container filled with air that is used to make a structure (such as a boat, airplane, or bridge) float on top of water浮筒；浮箱 -
The boat had two pontoons.这条船有两个浮筒。
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They built a pontoon bridge. [=a bridge that floats on the water and is held up by pontoons]他们搭建了一座浮桥。
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a pontoon plane [=an airplane that has pontoons on the bottom so that it can float on water]浮筒式水上飞机