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Definition of heater

heater

/ˈhiːtər/
heat · er

Plural:heaters
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heater Lexical Profile

heater Game Scores & Validity

• noun

1

A device or apparatus that generates and radiates heat, used to raise the temperature of an enclosed space or a fluid.

Example

"During the bitter winter nights, they relied on a small portable heater to keep the bedroom warm."


2

American A high-speed pitch in baseball, typically thrown with maximum velocity; a fastball.

Example

"The rookie pitcher struck out the veteran batter with a 98-mph heater right down the middle of the plate."


3

American A slang term for a handgun or firearm.

Example

"In the classic noir film, the detective checked his coat pocket to make sure he was carrying his heater before stepping into the alley."

Synonyms
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Antonyms
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• Rhymes for heater

Word Origin & Etymology

Late Middle English, derived from the verb 'heat' combined with the agent suffix '-er' to describe an apparatus that generates warmth.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Heater. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/heater
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