a piece of metal that can be moved to allow more or less air into a fire so that the fire burns more or less strongly (调节空气流量,控制炉火燃烧的)风门,气闸,挡板 a device in a piano that is used to reduce the level of the sound produced (钢琴的)制音器,减音器 - (British English also dampener)damper (on something) (informal)
a thing that makes something less pleasant, successful, etc. 抑制;使扫兴;使沮丧 Lily isn't letting motherhood put a damper on her social life. 莉莉不会让母亲身份影响她的社交生活。 The only damper on the show was the rain at the closing ceremony. 这场演出唯一令人扫兴的是闭幕式上的雨。