- 1a deep hole or holes under the ground where minerals such as coal, gold, etc. are dug a copper/diamond mine see coal mine, gold mine, mining compare pit, quarry
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- 2a type of bomb that is hidden under the ground or in the ocean and that explodes when someone or something touches it see land mine Idioms
a person, book, etc. that can give you a lot of information on a particular subject
Check pronunciation: mine