Middle English fromwesterwesternfrom Old English westrawes-pero- in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
Westerly Sentence Examples
There is a canal two rods wide along the northerly and westerly sides, and wider still at the east end.
By highway, the journey was fifty miles—ten miles north to Ridgway, then westerly to Placerville and then back toward the southeast, all necessary to circumnavigate fourteen-thousand foot Mount Sneffles and its towering neighbors.
The general course of the Benin is westerly.
The prevailing winds in this region, which the sea traverses longitudinally, are westerly, but the sea itself causes the formation of bands of low barometric pressure during the winter season, within which cyclonic disturbances frequently develop, while in summer the region comes under the influence of the polar margin of the tropical high pressure belt.