mine

If something is mine, it belongs to me.

Example: Give that back to me! It's mine!

A mine is a large hole in the ground from which rocks and minerals are taken.

A mine is a device that explodes when it is touched, or when a ship, vehicle, or person comes close to it.

If you mine rocks or minerals, you dig them out of the ground.

If you mine an area, you dig a mine there.