noun.
An area in which explosive mines have been placed.
noun.
A situation that has many potential hazards or dangers.
The Century Dictionary and Cyclopedia
noun.
A body of navigable water in which submarine mines are anchored for the purpose of preventing an enemy's ships from entering a channel, harbor, or roadstead; also, the group of mines itself.
the GNU version of the Collaborative International Dictionary of English
noun.
a region in which explosive mines{4} have been placed, especially a region on land.
noun.
A situation in which a simple mistake can have disastrous consequences; a touchy or dangerous situation requiring great caution.