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damper

2 ENTRIES FOUND:
damper /ˈdæmpɚ/ noun
plural dampers
damper
/ˈdæmpɚ/
noun
plural dampers
Britannica Dictionary definition of DAMPER
[count]
: a flat piece of metal in a fireplace, furnace, etc., that controls the amount of air that can enter
: a small piece of wood inside a piano that is covered with cloth and that stops the movement of a piano string

put a damper on

: to make (something) less strong, active, or exciting