Mine can refer to a number of things:

• Mines are tunnels used in mining for extraction of resources.
• In medieval times, a mine was a tunnel dug under a castle wall to make it collapse. This was known as undermining or sapping. These tunnels were sometimes packed with explosives, leading to its modern military meaning:
• Mines are stationary self-contained explosive devices used for military purposes:
  • Landmines which are devices placed on the ground to destroy enemy vehicles and kill enemy soldiers who move over them.
  • Naval mines which are devices used for the same puposes as landmines but destroy sea-going vessels.
  • Claymore mines which are military weapons that fire shrapnel and are used for ambush.
  • Pyrotechnical mines which shoot multiple stars cannon style.

• There are several places called Mine:
  • Mine is a town in Saga, Japan.
  • Mine is a city in Yamaguchi, Japan.

• MINE is a design firm in San Francisco

• The word mine is also a possessive pronoun meaning "belonging to me".