Term: Superstructure Image: [{"name":"images\/public\/dictionary\/Superstructure_2zt7g37l.jpg","usrName":"Superstructure.jpg","size":218017,"type":"image\/jpeg","thumbnail":"images\/public\/dictionary\/thSuperstructure_76xc7h24.jpg","thumbnail_type":"image\/jpeg","thumbnail_size":59850,"searchStr":"Superstructure.jpg,!:sStrEnd"}] Definition: Any type of structure that is above deck is considered the superstructure of a boat. It is important to note that the rigging is not considered part of the superstructure.