western (adj.)

"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.

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Definitions of western from WordNet
western (adj.)
relating to or characteristic of the western parts of the world or the West as opposed to the eastern or oriental parts;
western thought
the western world
western (adj.)
of or characteristic of regions of the United States west of the Mississippi River;
western (adj.)
lying toward or situated in the west;
our company's western office
western (adj.)
of wind; from the west;
Synonyms: westerly
western (n.)
a sandwich made from a western omelet;
Synonyms: western sandwich
Western (n.)
a film about life in the western United States during the period of exploration and development;
Synonyms: horse opera