n. & v. --n. 1 a flat-bottomed boat. 2 each of several boats, hollow metal cylinders, etc., used to support a temporary bridge. 3 = CAISSON 1, 2. --v.tr. cross (a river) by means of pontoons. [F ponton f. L ponto -onis f. pons pontis bridge]
PONTOON
Meaning of PONTOON in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012