1 a model of the human body used for putting clothes on in a shop window or while you are making clothes （用以陈列或裁制衣服的）人体模型: a tailor's dummy 裁衣模型

2 (informal 非正式) a stupid person 笨蛋: Don't just stand there like a dummy -- help me! 别像个木头人那样站在那儿，快来帮忙！

3 (US 美 pacifier) a rubber object that you put in a baby's mouth to keep him/her quiet and happy 橡皮奶头；奶嘴

4 something that is made to look like sth else but that is not the real thing 仿造物；仿制品: The robbers used dummy handguns in the raid. 这些强盗在袭击中用的是假手枪。