- a household appliance consisting of a gas or electric heating unit under a tank in which water is heated and stored.
Origin of water heater
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for water heater
The stand-pipe at the same time, being open to the air at the top, formed a safety-valve to the water-heater.The life of Isambard Kingdom Brunel, Civil Engineer
Inferior coal, parsimoniously stoked, took the water-heater a long time to get going.
In my apartment-house (and it was the same all over Paris because of the new law) the water-heater was having a good rest.
“The man who put in the summer water-heater called the little light that burns all the time in that, a ‘pilot,’” said Ethel Blue.Ethel Morton at Sweetbrier Lodge
Mabell S. C. Smith