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]