Meaning of ORE in English

ORE

[noun] - a mineral or a combination of such chemical substances, which are formed naturally in the ground and from which metal can be obtainediron/copper ore [U]an ore mine/producer [U]6 000 tons of ore can be processed at the site each day. [U]Metal ores are often found mixed with rock, dirt and clay and are rarely pure enough to be processed straight away. [C]The main iron ores are oxides, which are combinations of iron with oxygen. [C]

Cambridge English vocab.      Кембриджский английский словарь.