Guard

A person who, or thing that, protects or watches over something.

A squad responsible for protecting something.

A part of a machine which blocks access to dangerous parts.

A panel of a car that encloses the wheel area, especially the front wheels.

A relatively short player, playing farther from the basket than a forward or center.

The position on the popping crease where a batsman makes a mark to align himself with the wicket; see take guard.

Either of two offensive positions between the center and each of the offensive tackles, whose main responsibilities are to protect the quarterback, and open up "holes" through which offensive players can run.

A player playing a position named guard.

An employee, normally travelling in the last vehicle of a train, responsible for the safety of the train.

To protect from some offence (specific or abstract.).