A mine is a place where deep holes and tunnels are dug under the ground in order to obtain a mineral such as coal, diamonds, or gold. coal mines
A mine is a bomb which is hidden in the ground or in water and which explodes when people or things touch it
If an area of land or water is mined, mines are placed there which will explode when people or things touch them. The approaches to the garrison have been heavily mined
When a mineral such as coal, diamonds, or gold is mined, it is obtained from the ground by digging deep holes and tunnels. The pit is being shut down because it no longer has enough coal that can be mined economically
If you say that someone is a mine of information, you mean that they know a great deal about something. see also mining