noncombustible
- a not capable of igniting and burning
- The man-made structures hold a mixture of the noncombustible ingredients of coal and the ash trapped by equipment designed to reduce air pollution from the power plants.
- All electrical wiring was coated with noncombustible materials.
- Said Los Angeles Assistant Fire Chief Don Anthony: "If sparks coming from the first burning tree had landed on a noncombustible roof, you may not have had the fire in the .