"toward or of the west," late Old English westerne "western, westerly, coming from the west," from west + -erne, suffix denoting direction. The noun meaning "book or movie about the Old West" is first attested 1909. Westerner is from 1837 as "person from the U.S. West," 1880 as "Euro-American," as opposed to Oriental.
western thought
the western world
our company's western office
West Bank
West Indies
wester
westerlies
westerly
western
westernization
westernize
westernmost
Westphalia
westward