Definition of eastern:
lying toward or situated in the east; "the eastern end of the island"
of or characteristic of eastern regions of the United States; "the Eastern establishment"
lying in or toward the east; "the east side of New York"; "eastern cities"
relating to or characteristic of regions of eastern parts of the world; "Eastern Europe"; "the Eastern religions"
from the east; used especially of winds; "an eastern wind"; "the winds are easterly"