windsock
/ˈwɪndsɑːk/
noun
- A long, cone-shaped cloth tube open at both ends, mounted on a pole to show the direction and strength of the wind, typically at airports or airfields.
- A windsock flapping straight out means strong winds.
- The pilot checked the windsock before landing to see which way the wind was blowing.
- The small airport had a windsock next to the runway.