The Collaborative International Dictionary of English v.0.48:

Journalistic \Jour"nal*is"tic\, a.
   Pertaining to journals, journalism, or to journalists;
   contained in, or characteristic of, the public journals; as,
   journalistic literature or enterprise.
   [1913 Webster]

WordNet (r) 3.0 (2006):

journalistic
    adj 1: of or relating to or having the characteristics of
           journalism; "journalistic writing"