dead zone

An area with no life.

An area of the ocean where oxygen levels are too low to support life, especially as a result of pollution.

A region where mobile phones do not operate because there is no base station or repeater nearby.

The part of the field where a player is on their opponent's side of the field but kicking a field goal would probably be unsuccessful and punting the ball would not dramatically change field position.

An area near a fortification that is relatively sheltered from defending fire because direct fire from other parts of the walls cannot be directed around a curved wall.

A region within the player's viewpoint that is less sensitive to small movements, aiding accurate firing of weapons etc.