The Collaborative International Dictionary of English v.0.48:

Uncover \Un*cov"er\, v. t. [imp. & p. p. Uncovered; p. pr. &
   vb. n. Uncovering.] [1st pref. un- + cover.]
   1. To take the cover from; to divest of covering; as, to
      uncover a box, bed, house, or the like; to uncover one's
      body.
      [1913 Webster]

   2. To show openly; to disclose; to reveal. "To uncover his
      perjury to the oath of his coronation." --Milton.
      [1913 Webster]

   3. To divest of the hat or cap; to bare the head of; as, to
      uncover one's head; to uncover one's self.
      [1913 Webster]

WordNet (r) 3.0 (2006):

uncovering
    n 1: the removal of covering [syn: denudation, stripping,
         uncovering, baring, husking]
    2: the act of discovering something [syn: discovery, find,
       uncovering]