Westerlies(redirected from Prevailing westerlies)
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1. Situated toward the west.
2. Coming or being from the west: westerly winds.
n. pl. west·er·lies
A storm or wind coming from the west.
[Middle English, from wester, western, from Old English westra; see wes-pero- in Indo-European roots.]
(Physical Geography) meteorol the prevailing winds blowing from the west on the poleward sides of the horse latitudes, often bringing depressions and anticyclones