adj. 1 of or in the east; inhabiting the east. 2 lying or directed towards the east. 3 (Eastern) of or in the Far, Middle, or Near East. Eastern Church the Orthodox Church. Eastern hemisphere the half of the earth containing Europe, Asia, and Africa. Eastern Time standard time used in eastern Canada and the US or in eastern Australia. easternmost adj.
[ OE easterne (as EAST, -ERN) ]