noun

1. the direction to the left of a person facing north; direction in which sunset occurs: it is properly the point on the horizon at which the center of the sun sets at the equinox
2. the point on a compass at 270°, directly opposite east
3. a region or district in or toward this direction

Etymology: ME < OE, akin to Ger < IE *we- (< base *au-, down, away from) > Gr hesperos, L vesper, evening

adjective

1. in, of, to, toward, or facing the west
2. from the west a west wind
3. designating the western part of a continent, country, etc. West Africa
4. in, of, or toward that part of a church directly opposite the altar

adverb