Source : Webster's Revised Unabridged Dictionary (1913)

Eastern \East"ern\, a. [AS. e['a]stern.]
   1. Situated or dwelling in the east; oriental; as, an eastern
      gate; Eastern countries.

            Eastern churches first did Christ embrace.
                                                  --Stirling.

   2. Going toward the east, or in the direction of east; as, an
      eastern voyage.

   {Eastern Church}. See {Greek Church}, under {Greek}.

Source : WordNet®

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}]