Technical and formal use: to subject something to the heat of a furnace.
Definitions
To heat, smelt, or process in a furnace. The laboratory furnaced the sample at 1000 °C for two hours.
To burn or glow with intense heat. The coals furnaced brightly in the hearth.
Attributive use, e.g., "furnace oil", "furnace room".
Definitions
Designed for, relating to, or used in a furnace. The engineer recommended a special furnace alloy.