(1):

(n.) A feed head. See under Feed, n.

(2):

(n.) A shaft excavated from below upward.

(3):

(n.) The upright piece of a step, from tread to tread.

(4):

(n.) One who rises; as, an early riser.

(5):

(n.) Any small upright face, as of a seat, platform, veranda, or the like.