A wind blowing from the west; = "westerly".
Mid 19th century; earliest use found in Thomas Haliburton (1796–1865), politician and writer. From west + -er.
adjectivedialect Scottish, Canadian
Situated or lying (further) to the west; western, westerly. Frequently in place names (especially in Scotland and Newfoundland).
Old English. Cognate with Old Frisian westra, westera, wester, Middle Dutch wester, Middle Low German wester, Old High German westar (Middle High German wester), Old Icelandic vestri, vestari (Icelandic vestar), Norwegian vestre, Old Swedish västre (Swedish västra), Old Danish waestre, waester, westre (Danish vestre), showing a formation ultimately from the same base as west with different suffixation; compare adverb and noun forms with final -r cited at west [adjective, noun¹, preposition].
1no object Of the sun or other celestial object: to travel westward in its course; to decline towards the west.
2no object Of the wind: to change to a more westerly direction; to blow more strongly from the west.
3no object To move (further) west; in later use especially with reference to migration westward across North America.
Late Middle English; earliest use found in Geoffrey Chaucer (c1340–1400), poet and administrator. Probably from wester; perhaps compare -er.