1783, Edward Gibbon, The History of the Decline and Fall of the Roman Empire, London: W. Strahan & T. Cadell, Volume 3, Chapter 17, p. 8,
Those who steer their westward course through the middle of the Propontis, may at once descry the high lands of Thrace and Bithynia, and never lose sight of the lofty summit of Mount Olympus, covered with eternal snows.
adverb
Toward the west.
ride westward.
1857, John Henry Hopkins Jr., “We Three Kings” (Christmas carol),
O star of wonder, star of night,
Star with royal beauty bright,
Westward leading, still proceeding,
Guide us to thy perfect light.