a small slender (often pointed) piece of wood or metal used to support or fasten or attach things

fasten or secure with a wooden pin

pierce with a wooden pin or knock or thrust a wooden pin into

a short peg put into the ground to hold a golf ball off the ground

a peg driven into the ground to hold a rope supporting a tent

a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast