A naturally occurring solid material containing a precious or useful metal in such quantity and in such chemical combination as to make its…

Metallic ore. Obsolete.

A mineral or metallic ore, esp. (in later use) iron ore. Also figurative.

A substance obtained by mining; a product of the depths of the earth, esp. one other than a native metal. Also in Mining: an ore. Also figurative.

An ore (cf. mine, n. 2a). Obsolete.

Zinc. (Now only Commerce) Also locally applied to various ores.

Metal ore of a brittle, crumbly nature. With distinguishing word indicating the type of metal. Cf. slick, n.2

(see quots.).

U.S. Rock containing a desired metal or other substance; mineral ore.

Any of a group of manganese oxide minerals including psilomelane, esp. those with a hard texture.