One who heats something or tends a heating apparatus.(noun)
Slang A pistol.(noun)
Baseball A fastball.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "heater" in a sentence
"A Finnish sauna heater is also provided next to the minimal equipment."
"From Carisa, this heater is a non-singing and home-heating version of a harp."
"One thing you should research before investing in materials for a water heater is of the opinion that this game diy solar water heater system may not be the best for your country if you live in cold climates."