The Collaborative International Dictionary of English v.0.48:

Reporter \Re*port"er\ (-[~e]r), n.
   One who reports. Specifically:
   (a) An officer or person who makes authorized statements of
       law proceedings and decisions, or of legislative debates.
   (b) One who reports speeches, the proceedings of public
       meetings, news, etc., for the newspapers.
       [1913 Webster]

             Of our tales judge and reportour.    --Chaucer.
       [1913 Webster]

WordNet (r) 3.0 (2006):

reporter
    n 1: a person who investigates and reports or edits news stories
         [syn: reporter, newsman, newsperson]

Moby Thesaurus II by Grady Ward, 1.0:

102 Moby Thesaurus words for "reporter":
   a tale-bearing animal, adviser, anchorman, announcer, annunciator,
   authority, broadcaster, busybody, cameraman, channel, city editor,
   columnist, commentator, communicant, communicator, copy chief,
   copy editor, copyman, copyreader, correspondent, cub reporter,
   diaskeuast, editor, editorial writer, enlightener, expert witness,
   feature editor, foreign correspondent, gazetteer, gossip,
   gossip columnist, gossiper, gossipmonger, grapevine, herald,
   informant, information center, information medium, informer,
   interviewee, interviewer, journalist, leader writer, leg man,
   managing editor, monitor, mouthpiece, news editor, newscaster,
   newsman, newsmonger, newspaperman, newspaperwoman, newswriter,
   notifier, official spokesman, own correspondent, paragrapher,
   paragraphist, photojournalist, press, pressman, prolocutor,
   prolocutress, prolocutrix, public relations officer, publicist,
   publisher, quidnunc, radio, rapporteur, reader, reviser,
   rewrite man, rewriter, rumormonger, scandalmonger, slotman,
   sob sister, source, speaker, special correspondent, spokesman,
   spokeswoman, sports editor, stringer, subeditor, tabby, talebearer,
   taleteller, tattler, tattletale, television, teller, telltale,
   tipster, tittle-tattler, tout, voice, war correspondent, witness,
   yenta



The Devil's Dictionary (1881-1906):

REPORTER, n.  A writer who guesses his way to the truth and dispels it
with a tempest of words.

    "More dear than all my bosom knows, O thou
    Whose 'lips are sealed' and will not disavow!"
    So sang the blithe reporter-man as grew
    Beneath his hand the leg-long "interview."
                                                          Barson Maith