coast² v [I] 1 to keep moving in a vehicle or on a bicycle without using power from the engine or without using your legs 〔不使用动力〕滑行: We coasted downhill. 我们滑下山坡。 2 to achieve something very easily 轻易地达到: Wilson coasted to victory in the election. 威尔逊轻而易举地在竞选中获胜。