1. The act or process of one that fires
2. The process of maturing ceramic products by the application of heat
ETYM Old Fren. fouail, fuail, or fouaille, fuaille, Late Lat. focalium, focale, from Latin focus hearth, fireplace, in Late Lat., fire. Related to Focus.
A substance that can be burned to provide heat or power; SYN. combustible, combustible material.
Any source of heat or energy, embracing the entire range of materials that burn in air (combustibles). A nuclear fuel is any material that produces energy by nuclear fission in a nuclear reactor.