Dictionary.com
Thesaurus.com

water heater

American  

noun

  1. a household appliance consisting of a gas or electric heating unit under a tank in which water is heated and stored.

Etymology

Origin of water heater

First recorded in 1875–80

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Its piped town gas business will likely be supported by network growth and residential gas water heater penetration, the analyst says.

From The Wall Street Journal • Feb. 4, 2026

Covarrubias wants to add a cellar to his new home to house the water heater and other machinery.

From Los Angeles Times • Jul. 10, 2025

Hard water is caused by mineral buildup, which isn’t bad for your health but can create limescale on appliances like your water heater.

From Los Angeles Times • Jul. 22, 2024

The water heater was installed by an “outside vendor” a week before Rodriguez died, according to the report.

From Seattle Times • Mar. 13, 2024

Anne got hot water from the water heater, Margot went for a bucket, all hands on deck!

From "The Diary of a Young Girl" by Anne Frank

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.