This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. One that deadens, restrains, or depresses: Rain put a damper on our picnic plans.

n. An adjustable plate, as in the flue of a furnace or stove, for controlling the draft.

n. Music A device in various keyboard instruments for deadening the vibrations of the strings.

n. Music A mute for various brass instruments.

n. A device that eliminates or progressively diminishes vibrations or oscillations, as of a magnetic needle.

n. Something that damps or checks:

n. Bread made from a basic recipe of flour, water, milk, and salt, but without yeast.

adj. comparative form of damp: more damp

n. A valve or movable plate in the flue or other part of a stove, furnace, etc., used to check or regulate the draught of air.

n. A contrivance, as in a pianoforte, to deaden vibrations; or, as in other pieces of mechanism, to check some action at a particular time.

n. One who or that which damps.

n. A kind of unfermented bread, made of flour and water, and generally baked on a stone.

n.

n. a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations

n. a movable iron plate that regulates the draft in a stove or chimney or furnace

n. a depressing restraint

"Either way, their predicament could put a long-term damper on the consumer spending that typically drives U.S. growth."

plate    restraint   

camper    hamper    pamper    scamper    stamper    tamper   

driver    compensator    countermeasures    actuators    transducers    telluride    impaction    gyroscope