erosion /iˈrəuʒən/ n. ［u］ 1.腐蚀，侵蚀，磨损： prevent soil erosion 防止土壤流失 Soil conservation is intended to curb erosion. 保持土壤的目的是控制侵蚀。 2.削弱，减少：the slow erosion of royal power 皇权逐渐削弱