pontoon
nounUK /pɒnˈtuːn/
US /pɑːnˈtuːn/
A pontoon is a flat floating boat or block that helps people or things stay on top of the water.
The little bridge was built on pontoons so it could float on the river.
SYNONYMS
OTHER MEANINGS
2. One of the hollow floats that support a temporary bridge.
The army engineers placed pontoons across the river to build a bridge.
3. A flat-bottomed boat used as a ferry or work platform.
Workers used a pontoon to carry tools out to the damaged pier.
4. A float attached to the side of an aircraft for landing on water.
The seaplane rested on its pontoons beside the dock.
5. In British card games, a version of blackjack.
They played pontoon by the fire on a rainy evening.