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.
Top Definition. pontoon. sounds like a dirty word but its actually a marine engineering term for containers fastened together to support a floating bridge, boat or.
pontoon: A floating structure, such as a flatbottom boat, that is used to support a bridge. Create a book Download define pontoon PDF Printable version. A box used to raise a sunken vessel. Log in or sign up to add your own related words. You guard the pontoon bridge with a squad of Iraqi Army soldiers and a single interpreter. Is it 'I Could Care Less' or 'I Couldn't Care Less'?