Etymology
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damper (n.)

"one who or that which dampens," 1748, in the figurative sense, in reference to spirits, enthusiasm, etc., agent noun from damp (v.). In mechanical senses, "device for checking action:" 1783 in reference to a felt-covered piece of wood, etc., which deadens the string after the note is played; 1788 of a chimney, stove, etc., "metal plate in the flue used to control combustion by regulating the draft." Either or both reinforced the figurative senses. The piano damper-pedal (1848) raises the dampers of all the strings so the notes are prolonged and sympathetic vibrations produced.

updated on December 06, 2018

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Definitions of damper from WordNet

damper (n.)
a movable iron plate that regulates the draft in a stove or chimney or furnace;
damper (n.)
a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations;
Synonyms: muffler
damper (n.)
a depressing restraint;
rain put a damper on our picnic plans
From wordnet.princeton.edu, not affiliated with etymonline.

Dictionary entries near damper

damned

Damocles

damp

dampen

dampener

damper

damsel

dan

Dan

Dana

Danaid