(1):

(v. i.) To shine forth; to brighten; to become smooth and glossy, as from swelling or filling out; hence, to grow large.

(2):

(n.) The effect of burnishing; gloss; brightness; luster.

(3):

(a.) To cause to shine; to make smooth and bright; to polish; specifically, to polish by rubbing with something hard and smooth; as, to burnish brass or paper.