Толковый словарь английского языка Oxford English Reference - damper

n. 1 a person or thing that discourages, or tempers enthusiasm. 2 a device that reduces shock or noise. 3 a metal plate in a flue to control the draught, and so the rate of combustion. 4 Mus. a pad silencing a piano string except when removed by means of a pedal or by the note's being struck. 5 esp. Austral. & NZ unleavened bread or cake of flour and water baked in wood ashes. Phrases and idioms put a damper on take the vigour or enjoyment out of.