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.
      [1913 Webster]

   2. To remove the covers from dishes, or the like.
      [1913 Webster]

            Uncover, dogs, and lap.               --Shak.
      [1913 Webster]

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]

Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "uncover":
   accost, address, bare, betray, bid good day, bid good morning,
   bow to, break the seal, bring to light, clear, curtsy, denudate,
   denude, deobstruct, develop, dig up, disclose, discover, disinter,
   dismask, display, divest, divulge, draw the veil, excavate,
   exchange greetings, exhume, expose, ferret out, fish up, fleece,
   free, greet, hail, impart, kiss, kiss hands, lay bare, lay open,
   let daylight in, let out, lift the hat, manifest, nod to, open,
   open up, patefy, pluck, pull the forelock, raise the curtain,
   remove, reveal, root up, salute, say hello, shake, shake hands,
   shear, show, show up, strip, strip bare, subject, tell,
   touch the hat, turn up, unblock, uncase, unclench, uncloak, unclog,
   unclothe, unclutch, uncork, uncurtain, undo, undrape, unearth,
   unfold, unfoul, unfurl, unkennel, unlatch, unlock, unmask, unpack,
   unplug, unroll, unscreen, unseal, unsheathe, unshroud, unshut,
   unstop, unveil, unwrap, worm out