Source : Webster's Revised Unabridged Dictionary (1913)

Eastward \East"ward\, Eastwards \East"wards\, adv.
   Toward the east; in the direction of east from some point or
   place; as, New Haven lies eastward from New York.

Source : WordNet®

eastward
     adj : moving toward the east; "eastbound trains" [syn: {eastbound}]
     adv : toward the east; "they migrated eastward to Sweden" [syn: {eastwards}]