Any defensive measure against an attack by missiles etc while in space

(ice hockey) The ice between a team's own blue line and its end board.

The means of defending oneself from physical attack.

(American football) Any of a few defensive positions in the middle of the defensive line.

(cricket) A field set with fielders in positions designed to prevent runs rather than take wickets.

(basketball, soccer) A defense in which each player covers an area of the court.

(baseball) An official scoring judgement in which a runner is not credited with a stolen base because the team playing the field did not try to stop the steal. This typically occurs late in a game when the fielding team is winning by at least two runs.

(law, humorous) Any legal strategy or propaganda strategy that seeks to overwhelm its audience with nonsensical arguments, as a way of confusing the audience and drowning out legitimate opposing arguments.

All the methods and procedures involved in defending against attack by chemical agents.

(law) A plea to the effect that from some formal defect (e.g. misnomer, lack of jurisdiction) the proceedings should be abated.