Word family noun pass overpass ≠ underpass passage passing adjective passing passable ≠ impassable verb pass
From Longman Dictionary of Contemporary Englishunderpassun‧der‧pass /ˈʌndəpɑːs $ ˈʌndərpæs/ noun [countable] British English TTRa road or path that goes under another road or a railwayExamples from the Corpus
underpass• He paid for an underpass beneath the main road which now separates Monet's house in Giverny from its famous garden.• And, according to state law, railroad traffic can not be interrupted, even during the construction of an underpass.• The price quoted for a bridge or underpass is always horrendous.• In some instances it will be necessary to provide a bridge or underpass.• The exhibit runs through February 16 at the center, south of the pedestrian underpass on Speedway, east of Park Avenue.• The Center is located south of the pedestrian underpass on Speedway, east of Park Avenue.• The beach is only yards away, across the road, or through the underpass. 