Ash, n., sing. of Ashes.
☞ Ash is rarely used in the singular except in connection with chemical or geological products; as, soda ash, coal which yields a red ash, etc., or as a qualifying or combining word; as, ash bin, ash heap, ash hole, ash pan, ash pit, ash-grey, ash-colored, pearlash, potash.
Bone ash, burnt powered; bone earth. — Volcanic ash. See under Ashes.