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noun Uncommon

furnace

FUR-nihs

Furnace (noun) means a heating device used to melt metal, fire ceramics, or heat a building. Example: “The old house relied on a coal furnace for heat.”

noun
1
A heating device used to melt metal, fire ceramics, or heat a building.
"The old house relied on a coal furnace for heat."
"Workers fed scrap metal into the blast furnace."
2
Any place or situation that is extremely hot.
"By noon the greenhouse had become a furnace."

How to use furnace

Learner’s notes

In plain EnglishA device for producing intense heat (for melting metal or heating a home), or informally any very hot place.

Common pairings
blast furnace furnace room like a furnace

Word forms

furnaced past tense, furnaces plural, furnaces singular

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Test yourself on “furnace” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

The old house relied on a coal _____ for heat.

Etymology

From Old French fornais, from Latin fornax, meaning "oven" or "kiln."

Origin: Latin

Related words

Rhymes for furnace

See all rhymes for furnace →

Frequently asked questions

What does “furnace” mean?

The word “furnace” means a heating device used to melt metal, fire ceramics, or heat a building. In plain terms, a device for producing intense heat (for melting metal or heating a home), or informally any very hot place.

How do you pronounce “furnace”?

“Furnace” is pronounced FUR-nihs (/ˈfɝnɪs/ in IPA).

How do you use “furnace” in a sentence?

Here is “furnace” used in a sentence: “The old house relied on a coal furnace for heat.”

What part of speech is “furnace”?

“Furnace” is a noun.

Where does the word “furnace” come from?

The word “furnace” comes from Latin. From Old French fornais, from Latin fornax, meaning "oven" or "kiln.".

Is “furnace” a common word?

“Furnace” is an uncommon word in modern English.

How many meanings does “furnace” have?

“Furnace” has 2 distinct senses listed in this dictionary. The most common is: a heating device used to melt metal, fire ceramics, or heat a building.

What is the difference between a furnace and an oven?

A furnace is designed to reach very high temperatures for tasks like melting metal, firing ceramics, or heating a building, while an oven is generally used at lower temperatures for cooking food. Furnaces are typically industrial or part of a building's heating system rather than kitchen appliances.

What is the difference between a furnace and a boiler?

A furnace heats air that is then distributed through a building, whereas a boiler heats water or produces steam for heating or other uses. Both can be part of a home heating system but they work by different methods.

Can furnace describe something other than a heating appliance?

Yes, furnace can be used figuratively to describe any place or situation that is extremely hot, such as calling a room a furnace on a summer day. This usage draws on the intense heat associated with an actual furnace.

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Definitions: FreeDict original editorial