windsock

UK: /ˈwɪndˌsɒk/ US: /ˈwɪndˌsɑk/ ,(wind′sok′)

WordReference Random House Learner's Dictionary of American English © 2025

wind•sock /ˈwɪndˌsɑk/   n. [countable]

1. Aeronautics a mounted cloth cone that catches the wind to show its direction.

WordReference Random House Unabridged Dictionary of American English © 2025

wind•sock  (wind′sok′), n. 

1. Aeronautics, Meteorology, Aeronautics a tapered, tubular cloth vane, open at both ends and having at the larger end a fixed ring pivoted to swing freely, installed at airports or elsewhere to indicate wind direction and approximate intensity. Also, wind′ sock′. Also called air sleeve, air sock, wind cone, wind′ sleeve′. 

• wind¹ + sock¹ 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::

windsock / ˈwɪndˌsɒk/ noun

1. a truncated cone of textile mounted on a mast so that it is free to rotate about a vertical axis: used, esp at airports, to indicate the local wind direction
   Also called: air sock, drogue, wind sleeve, wind cone