: an enclosed structure in which heat is produced (as for heating a house or for reducing ore)
Examples of furnace in a Sentence
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Now an apartment complex, the former elementary school is known for the dramatic scene in which Max, Dani and Allison tried (and failed) to burn the Sanderson sisters alive in the school's furnace.
—
Natalia Senanayake, PEOPLE, 24 Oct. 2025
Using a microwave furnace, the regolith melts and expands like a bubble before cooling into a hard, transparent shell.
—Kurt Knutsson, FOXNews.com, 23 Oct. 2025
When the temperature fell to 20 below zero and the furnace went out in our run-down rental, Tuco kept me warm.
—Christine Peterson, Outdoor Life, 23 Oct. 2025
Services provided include attic insulation, energy efficient refrigerators, energy efficient furnaces, weatherstripping, caulking, low-flow showerheads, water heater blankets, and door and building envelope repairs which reduce air infiltration.
—Sacbee.com, 23 Oct. 2025
See All Example Sentences for furnace
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Natalia Senanayake, PEOPLE, 24 Oct. 2025
Using a microwave furnace, the regolith melts and expands like a bubble before cooling into a hard, transparent shell.
—Kurt Knutsson, FOXNews.com, 23 Oct. 2025
When the temperature fell to 20 below zero and the furnace went out in our run-down rental, Tuco kept me warm.
—Christine Peterson, Outdoor Life, 23 Oct. 2025
Services provided include attic insulation, energy efficient refrigerators, energy efficient furnaces, weatherstripping, caulking, low-flow showerheads, water heater blankets, and door and building envelope repairs which reduce air infiltration.
—Sacbee.com, 23 Oct. 2025
See All Example Sentences for furnace
Cite this Entry
“Furnace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/furnace. Accessed 29 Oct. 2025.
Copy CitationKids Definition
furnace
noun
fur·nace
ˈfər-nəs 
: an enclosed structure in which heat is produced (as for heating a house or melting metals)
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