泛滥fànlàn 1.江河湖泊的水溢出{(river or lake) overflow; be flooded; inundate}: 洪水～{flood waters overflow}|～成灾。{inundate and cause disaster} 2.〈比喻fig.〉坏的事物不受限制地流行{(of evil things) spread unchecked}: 不能让错误思想和言行自由～。{We must not allow erroneous ideas, words and actions to spread unchecked.}