The Collaborative International Dictionary of English v.0.48:

Barrister \Bar"ris*ter\, n. [From Bar, n.]
   Counselor at law; a counsel admitted to plead at the bar, and
   undertake the public trial of causes, as distinguished from
   an attorney or solicitor. See Attorney. [Eng.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

barrister
    n 1: a British or Canadian lawyer who speaks in the higher
         courts of law on behalf of either the defense or
         prosecution