- a flat-bottomed boat
- any of a number of these, or of some other floating objects, as hollow cylinders, used as supports for a temporary bridge (pontoon bridge)
- either of two floats, as on the landing gear of some airplanes, for landing on water
Origin of pontoonFrench ponton from Classical Latin ponto from pons (gen. pontis), a bridge: see pons
Any of various floating structures, especially:
a. A flatbottom boat used to support a bridge.
b. A floating structure that serves as a dock.
c. Either of a pair of floats supporting a boat or seaplane.
Origin of pontoonFrench ponton from Old French from Latin pontō pontōn- floating bridge from pōns pont- bridge ; see pent- in Indo-European roots.
- (card games) A card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it.