adv. , adj. /up"wind"/ ; n. /up"wind'/ , adv.
1. toward or against the wind or the direction from which it is blowing: The hunters stalked upwind.
adj.
2. moving or situated toward or in the direction from which the wind is blowing: an upwind leap; the upwind portions of the aircraft.
n.
3. a wind that blows against one's course or up a slope.
[ 1830-40; UP- + WIND 1 ]