Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
upwind is an adverb and adjective meaning "away from the wind". It carries 3 recorded senses.
in the direction opposite to the direction the wind is blowing
“they flew upwind”
Definitions, synonyms and semantic relations for upwind come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.