guard -- (a person who keeps watch over something or someone)
guard -- (the person who plays that position on a football team; "the left guard was injured on the play")
guard, safety, safety device -- (a device designed to prevent injury or accidents)
guard -- (a posture of defence in boxing or fencing; "keep your guard up")
guard -- (the person who plays the position of guard on a basketball team)
guard -- (a military unit serving to protect some place or person)
precaution, safeguard, guard -- (a precautionary measure warding off impending danger or damage or injury etc.; "he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down")
guard -- ((American football) a position on the line of scrimmage; "guards must be good blockers")
guard -- (a position on a basketball team)
Overview of verb guard
The verb guard has 4 senses
guard -- (to keep watch over; "there would be men guarding the horses")
guard, ward -- (watch over or shield from danger or harm; protect; "guard my possessions while I'm away")
defend, guard, hold -- (protect against a challenge or attack; "Hold that position behind the trees!"; "Hold the bridge against the enemy's attacks")
guard -- (take precautions in order to avoid some unwanted consequence; "guard against becoming too friendly with the staff"; "guard against infection")