upwind

adverb

1. toward or against the wind or the direction from which it is blowing: The hunters stalked upwind.

adjective

2. moving or situated toward or in the direction from which the wind is blowing: an upwind leap; the upwind portions of the aircraft.

noun

3. a wind that blows against one’s course or up a slope.

adverb

1. into or against the wind
2. towards or on the side where the wind is blowing; windward

adjective

3. going against the windthe upwind leg of the course
4. on the windward sidethe upwind side of the house has weathered

adj.

1838, from up- + wind (n.1). Originally a nautical term.