dam2 verb (dammed, damming) [transitiveT] (also dam up) 1. TECto stop the water in a river or stream from flowing by building a special wall across it 筑坝拦〔水〕,在…中筑堤
2 to stop something from being expressed or continuing 阻止,抑制 Once she allowed her anger to show, it could not be dammed up again. 她一旦发起脾气来就不可收拾。