The Collaborative International Dictionary of English v.0.48:

Gazetteer \Gaz`et*teer"\, n. [Cf. F. gazetier.]
   1. A writer of news, or an officer appointed to publish news
      by authority. --Johnson.
      [1913 Webster]

   2. A newspaper; a gazette. [Obs.] --Burke.
      [1913 Webster]

   3. A geographical dictionary; a book giving the names and
      descriptions, etc., of many places.
      [1913 Webster]

   4. An alphabetical descriptive list of anything.
      [1913 Webster]

WordNet (r) 3.0 (2006):

gazetteer
    n 1: a journalist who writes for a gazette
    2: a geographical dictionary (as at the back of an atlas)

Moby Thesaurus II by Grady Ward, 1.0:

96 Moby Thesaurus words for "gazetteer":
   atlas, biographical dictionary, calendar, casebook, catalog,
   catalogue raisonne, chemical dictionary, city directory,
   city editor, classified catalog, columnist, concordance,
   copy chief, copy editor, copyman, copyreader, correspondent,
   cub reporter, cyclopedia, desk dictionary, dialect dictionary,
   diaskeuast, diatesseron, dictionary, dictionary catalog,
   dictionary of quotations, directory, editor, editorial writer,
   electronics dictionary, encyclopedia, etymological dictionary,
   feature editor, foreign correspondent, foreign-language dictionary,
   general dictionary, geological dictionary, gloss, glossary, gradus,
   harmony, index, interviewer, journalist, leader writer, leg man,
   lexicon, managing editor, news editor, newsman, newspaperman,
   newspaperwoman, newswriter, nomenclator, onomasticon,
   own correspondent, paragrapher, paragraphist, phone book,
   phrase book, polyglot, polyglot dictionary, pressman, promptorium,
   publicist, reader, record book, reference book, reporter, reviser,
   rewrite man, rewriter, rhyming dictionary, science dictionary,
   slang dictionary, slotman, sob sister, source book,
   special correspondent, specialized dictionary, sports editor,
   studbook, subeditor, synonym dictionary, synonymy, telephone book,
   telephone directory, terminology, thesaurus, treasury of words,
   unabridged dictionary, vocabulary, war correspondent, word list,
   wordbook, work of reference