What is "magnetic mine"

magnetic mine \magnetic mine\ n. (Mil.) A marine mine that is detonated by a mechanism that detects the nearness of magnetic material (as the steel hull of a ship). A magnetic counter mine may allow the passagw of several ships before detonating.

n. (context military English) A mine which responds to the magnetic field of a target.

n. (nautical) a marine mine that is detonated by a mechanism that responds to magnetic material (as the steel hull of a ship)