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English definition of “pontoon”

pontoon

noun [C] (BRIDGE)    /pɒnˈtuːn/ US  /pɑːn-/
a small, flat boat or a metal structure of a similar shape used especially to form or support a temporary floating bridge: Military engineers hurriedly constructed a pontoon bridge across the river.BridgesBoats and sailing craftPassenger, cargo and military ships
(Definition of pontoon noun (BRIDGE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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