heat·​er | \ ˈhē-tər How to pronounce heater (audio) \

Definition of heater

1 : one that heats especially : a device that imparts heat or holds something to be heated
2 : fastball

Examples of heater in a Sentence

Recent Examples on the Web

Some of these, the heater especially, with its glowing red coil, had a somewhat ominous look. Calvin Tomkins, The New Yorker, "Vija Celmins’s Surface Matters," 26 Aug. 2019 The ordeal began at 10:49 a.m. when witnesses reported smelling gas and hearing numerous small explosions inside the pool house, where the heater, pump and other equipment were stored. Peter Fimrite, SFChronicle.com, "San Jose explosions probably caused by pool heater, fire official says," 21 July 2019 Both probes are now more than 11 billion miles from the sun, which makes the heaters crucial for maintaining functions. Ashley Strickland, CNN, "NASA's plan to keep the Voyager spacecraft awake and flying," 10 July 2019 Page highly recommends having a guard on the hot water heater set to a maximum of 120 degrees to prevent potential scorching of a baby’s skin. Deforest Mapp, USA TODAY, "How to make your home safe for baby," 19 June 2019 Some companies — including water-heater maker Rheem Manufacturing Co. — support the duties, but most are arguing that Trump shouldn’t tax their products. Bloomberg, latimes.com, "Even longtime backers of tariffs say Trump is pushing them too far," 17 June 2019 Two fans keep air flowing, extra insulation traps in heat during extreme cold, and a central command center controls the mechanicals, hot water, 200 watts of solar, 2,000-watt inverter, and the Espar hydronic diesel heater. Megan Barber, Curbed, "This custom camper van can sleep a family of 6," 11 July 2018 German’s pitches were noticeably sharper than his last start, averaging 93 mph with his heater and touching 95 mph on a handful of four-seamers. Bradford William Davis, courant.com, "Gio Urshela is here to challenge DJ LeMahieu for the batting title," 14 Aug. 2019 What's more, opponents hit .378 off his fastball in June and July after Paxton held hitters to a .233 clip against his heater in April and May. A mixed bag for James Paxton to start. Tom Verducci, SI.com, "Which Teams Are Facing the Most Trade Deadline Pressure? Start With the Yankees," 29 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heater.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of heater

15th century, in the meaning defined at sense 1

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Statistics for heater

Last Updated

13 Sep 2019

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Time Traveler for heater

The first known use of heater was in the 15th century

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More Definitions for heater



English Language Learners Definition of heater

: a machine that heats water or air


heat·​er | \ ˈhē-tər How to pronounce heater (audio) \

Kids Definition of heater

: a device for heating

More from Merriam-Webster on heater

Rhyming Dictionary: Words that rhyme with heater

Spanish Central: Translation of heater

Nglish: Translation of heater for Spanish Speakers

Comments on heater

What made you want to look up heater? Please tell us where you read or heard it (including the quote, if possible).


one from the Upper Peninsula of Michigan

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