[1] : WordNet (r) 2.0

dateline
     n 1: an imaginary line on the surface of the earth following
          approximately the 180th meridian syn: date line, international
          date line
     2: a line at the beginning of a news article giving the date
        and place of origin of the news dispatch
     v : mark with a date and place; "dateline a newspaper article"
         syn: datemark, date-mark
see also:
date line international date line datemark date-mark 

Dateline >> D Words
Dateline, definition of term: Dateline
dateline_pag1.html