The Collaborative International Dictionary of English v.0.48:

Uncover \Un*cov"er\, v. i.
   1. To take off the hat or cap; to bare the head in token of
      respect.
      [1913 Webster]

            We are forced to uncover after them.  --Addison.
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   2. To remove the covers from dishes, or the like.
      [1913 Webster]

            Uncover, dogs, and lap.               --Shak.
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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):

uncover
    v 1: make visible; "Summer brings out bright clothes"; "He
         brings out the best in her" [syn: uncover, bring out,
         unveil, reveal]
    2: remove all or part of one's clothes to show one's body;
       "uncover your belly"; "The man exposed himself in the subway"
       [syn: uncover, expose] [ant: cover]