furnace furnace /ˈfɝːnəs/

noun

1. () An enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.  ( furnace )
   an enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.
    We had to call a technician to fix the furnace before winter arrived.
   We had to call a technician to fix the furnace before winter arrived.