To set out on a journey.
To leave.
To die.
To disappear, vanish; to cease to exist.
To go away from; to leave.
To deviate (from), be different (from), fail to conform.
Synonym of set: to move toward the western horizon, to go down.
Used other than figuratively or idiomatically: see go, west.
To move to the American West, particularly (historical) during the 19th century era.