DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   preview
       n 1: an advertisement consisting of short scenes from a motion
            picture that will appear in the near future [syn:
            preview, prevue, trailer]
       2: a screening for a select audience in advance of release for
          the general public
       v 1: watch (a movie or play) before it is released to the
            general public