damper Syllabification: (damp·er)Pronunciation: /ˈdampər/Translate damper | into Italian | into Spanish Definition of damper noun a person or thing that has a depressing, subduing, or inhibiting effect:another damper on reactor development was the problem of safeguards Music a pad that silences a piano string except when removed by means of a pedal or by the note being struck. a device for reducing mechanical vibration, in particular a shock absorber on a motor vehicle. a conductor used to reduce hunting in an electric motor or generator. a movable metal plate in a flue or chimney, used to regulate the draft and so control the rate of combustion. Phrases put a damper on have a depressing, subduing, or inhibiting effect on:he put a damper on her youthful excitementdamper in other Oxford dictionaries Definition of damper in the British & World English dictionary