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Adjective: upwind  'úp,wind
  1. Towards the side exposed to wind
    - weather
Adverb: upwind  'úp,wind
  1. Away from the wind
    "they were sailing upwind";
    - leeward
  2. In the direction opposite to the direction the wind is blowing
    "they flew upwind";
    - against the wind, into the wind

See also: windward

Antonym: downwind

Encyclopedia: Upwind