(1):

(n.) One who polishes with a buff.

(2):

(n.) A wheel for buffing; a buff.

(3):

(n.) A good-humored, slow-witted fellow; - usually said of an elderly man.

(4):

(n.) A pad or cushion forming the end of a fender, which receives the blow; - sometimes called buffing apparatus.

(5):

(n.) An elastic apparatus or fender, for deadening the jar caused by the collision of bodies; as, a buffer at the end of a railroad car.