Term: Pontoon Boat Image: [{"name":"images\/public\/dictionary\/Pontoon Boat_c6r49mfj.jpg","usrName":"Pontoon Boat.jpg","size":185591,"type":"image\/jpeg","thumbnail":"images\/public\/dictionary\/thPontoon Boat_abodrj4p.jpg","thumbnail_type":"image\/jpeg","thumbnail_size":35943,"searchStr":"Pontoon Boat.jpg,!:sStrEnd"}] Definition: A type of boat with a flat deck attached to airtight flotation tubes or logs.