furnace
nounUK /ˈfɜːnɪs/
US /ˈfɜːrnɪs/
A furnace is a very hot machine that makes heat to warm a building.
The old furnace in the basement keeps the whole house warm in winter.
RELATED WORDS
OTHER MEANINGS
2. A very hot place or situation that feels like it is burning.
The desert at noon was a furnace, with heat rising off the sand.
3. An industrial oven used to melt metal or make glass.
Workers poured the melted iron from the furnace into molds.
4. A difficult or intense experience that tests someone.
The final exams were a furnace of stress for the students.