Search the dictionary A Chinese word or character, or English Search 2 entries. lóngménduàncéng 龙门断层 Longmenshan fault line, a tectonically active thrust fault line at the northwest boundary of the Sichuan basin lóngménduàncéng 龍門斷層 Longmenshan fault line, a tectonically active thrust fault line at the northwest boundary of the Sichuan basin