1. n. Brit.
1. a card-game in which players try to acquire cards with a face value totalling 21 and no more.
2 NATURAL n. 4a.
Etymology: prob. corrupt. 2. 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.
Etymology: F ponton f. L ponto -onis f. pons pontis bridge