Pronunciation: (fûr'nis), [key]
—n., v., -naced, -nac•ing.
1. a structure or apparatus in which heat may be generated, as for heating houses, smelting ores, or producing steam.
2. a place characterized by intense heat: The volcano was a seething furnace.
3. (cap.) Astron.the constellation Fornax.
to heat (a metal piece) in a furnace.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.