n One of a number of narrow strips of wood, or narrow iron plates, placed edge to edge to form the sides, covering, or lining of a vessel or structure; esp., one of the strips which form the sides of a cask, a pail, etc.
n One of the bars or rounds of a rack, rungs of a ladder, etc; one of the cylindrical bars of a lantern wheel
n The five horizontal and parallel lines on and between which musical notes are written or pointed; the staff.