I. -tərlē, -li, - R -təl- sometimes -t ə l- adverb (or adjective)
Etymology: from northwest (III) , after English west; westerly
1. : from the northwest
winds blowing northwesterly
northwesterly frosts — Spectator
2. : toward the northwest
steered the ship northwesterly
journeyed northwesterly all day
II. noun
: a wind from the northwest