min·er·al (mnr-l) n.
1 A naturally occurring, homogeneous inorganic solid substance having a definite chemical composition and characteristic crystalline structure, color, and hardness.
2 Any of various natural substances, as:
a An element, such as gold or silver.
b An organic derivative, such as coal or petroleum.
c A substance, such as stone, sand, salt, or coal, that is extracted or obtained from the ground or water and used in economic activities.
3 A substance that is neither animal nor vegetable; inorganic matter.
4 An inorganic element, such as calcium, iron, potassium, sodium, or zinc, that is essential to the nutrition of humans, animals, and plants.
5 An ore.
minerals Chiefly British. Mineral water.