- an enclosed chamber or structure in which heat is produced, as by burning fuel, for warming a building, reducing ores and metals, etc.
- any extremely hot place
- a grueling test or trial
Origin of furnaceMiddle English furnaise from Old French fornais from Classical Latin fornax (gen. fornacis), furnace: see warm
- An enclosure in which energy in a nonthermal form is converted to heat, especially such an enclosure in which heat is generated by the combustion of a suitable fuel.
- An intensely hot place: the furnace of the sun; an attic room that is a furnace in the summer.
- A severe test or trial: endured the furnace of his friends' blame after the accident.
Origin of furnaceMiddle English fourneyse from Old French fornaise variant of earlier fornais from Latin fornāx fornāc- oven ; see gwher- in Indo-European roots.
(third-person singular simple present furnaces, present participle furnacing, simple past and past participle furnaced)
- To heat in a furnace