'Upwind' definitions:

Definition of 'upwind'

From: WordNet
adverb
Toward the wind; "they were sailing leeward" [syn: leeward, upwind] [ant: downwind, windward]
adverb
In the direction opposite to the direction the wind is blowing; "they flew upwind" [syn: upwind, against the wind, into the wind] [ant: downwind]
adjective
Towards the side exposed to wind [syn: upwind, weather(a)]

Definition of 'Upwind'

From: GCIDE
  • Upwind \Up*wind"\, v. t. To wind up. --Spenser. [1913 Webster]

Definition of 'upwind'

From: GCIDE
  • upwind \up"wind`\, a. being or moving in the direction from which the wind is blowing. [PJC]