1. A place where a vehement fire and heat may be made and maintained, for melting ores or metals, _c. A furnace for casting cannon and other large operations is inclosed with walls through which a current of air is blown from a large bellows. In smaller operations a vessel is constructed with a chamber or cavity, with a door and a grate.

2. In scripture, a place of cruel bondage and affliction. Deu 4.

3. Grievous afflictions by which men are tried. Ezek 22.

4. A place of temporal torment. Dan 3.

5. Hell; the place of endless torment. Mat 13.

, v.t. To throw out sparks as a furnace.