Wordnet 3.0
VERB (2)
1. 
 release; 
- Example: "uncork his anger"2. 
 draw the cork from (bottles); 
- Example: "uncork the French wine"
The Collaborative International Dictionary of English v.0.48:
Uncork \Un*cork"\, v. t. [1st pref. un- + cork.]
   To draw the cork from; as, to uncork a bottle.
   [1913 Webster]
WordNet (r) 3.0 (2006):
uncork
    v 1: release; "uncork his anger"
    2: draw the cork from (bottles); "uncork the French wine" [ant:
       cork, cork up]
Moby Thesaurus II by Grady Ward, 1.0:
30 Moby Thesaurus words for "uncork":
   bare, clear, deobstruct, disclose, expose, free, manifest, patefy,
   reveal, unblock, uncase, unclench, unclog, unclutch, uncover,
   uncurtain, undo, undrape, unfold, unfoul, unlatch, unlock, unplug,
   unroll, unseal, unsheathe, unshut, unstop, unveil, unwrap