An excavation in the earth for extracting coal or other minerals. A type of bomb placed on or just below the surface of the ground or in the water that detonates when disturbed by a person, vehicle, or ship. Obtain (coal or other minerals) from a mine. Lay explosive mines on or just below the surface of (the ground or water). Used to refer to a thing or things belonging to or associated with the speaker. (used before a vowel) my.