n. 1. the upper level of a crossing of two highways at different levels; called in the United States an overpass; as, an overpass is called a flyover or a flypast in England. [ Brit. ] Syn. -- overpass, flypast. [ WordNet 1.5 ]
2. a low-altitude flight (usually of military aircraft) over spectators on the ground. Syn. -- flypast. [ WordNet 1.5 ]