drop down 1. (使)掉下，(使)落下 I heard a noise from the well and saw that the cat had dropped down. 我听到井里一声响，看见猫已经掉下去了。 They dropped down a rope to see if it was safe. 他们放一根绳子下去看看是不是安全。 2. 迅速低下身子；倒下 drop down on one's knees 跪下 drop down dead 倒毙 3. 〈口〉顺便访问 Let's drop down to his home to tell him when we are going. 我们顺便到他家去一下，告诉他我们什么时候走。 4. 随波(或顺风)漂下