[1] : The Collaborative International Dictionary of English v.0.48

eastern \east"ern\, a. as. e'astern.
   1. situated or dwelling in the east; oriental; as, an eastern
      gate; eastern countries.
      1913 webster

            eastern churches first did christ embrace.
                                                  --stirling.
      1913 webster

   2. going toward the east, or in the direction of east; as, an
      eastern voyage.
      1913 webster

[2] : WordNet (r) 2.0

eastern
     adj 1: lying toward or situated in the east; "the eastern end of
            the island"
     2: of or characteristic of eastern regions of the united
        states; "the eastern establishment" ant: western
     3: lying in or toward the east; "the east side of ny"; "eastern
        cities" syn: easterly
     4: relating to or characteristic of regions of eastern parts of
        the world; "the eastern hemisphere"; "eastern europe";
        "the eastern religions" ant: western
     5: from the east; used especially of winds; "an east wind";
        "the winds are easterly" syn: easterly
see also:
western easterly 

[3] : U.S. Gazetteer (1990)

eastern, ky
  zip codes: 41622

Eastern >> E Words
Eastern, definition of term: Eastern
eastern_pag1.html

Eastern Standar >> E Words
Eastern Standar, definition of term: Eastern Standar
eastern+standar_pag1.html

Eastern Orthodo >> E Words
Eastern Orthodo, definition of term: Eastern Orthodo
eastern+orthodo_pag1.html

Eastern Orthodo >> E Words
Eastern Orthodo, definition of term: Eastern Orthodo
eastern+orthodo_pag1.html

Eastern Hemisph >> E Words
Eastern Hemisph, definition of term: Eastern Hemisph
eastern+hemisph_pag1.html