A person who, or thing that, protects or watches over something. • A garda; a police officer. • A squad responsible for protecting something. • An elite military unit in Russia, the former Soviet Union and several post-Soviet countries. • The part of a sword that protects the wielder's hand. • A part of a machine which blocks access to dangerous parts. • A watchchain. • A panel of a car that encloses the wheel area, especially the front wheels. • A state of caution; posture of defence. • Something worn to protect part of the body, e.g. the shins in cricket. • A relatively short player, playing farther from the basket than a forward or centre. • 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 centre 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 ground grappling position in which one combatant has their back to the ground while attempting to control the other combatant using their legs. • 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. • A Boolean expression that must evaluate to true for a branch of program execution to continue. • The aircraft emergency frequency, a radio frequency reserved for emergency communications, typically 121.5MHz for civilian use.