Plain English Meaning
Things on the ground at an airport that show pilots which way the wind is blowing, so they know which runway to use.
Full Definition
Visual devices located on or near an airport that show the direction the wind is blowing, allowing pilots to determine the favored runway for takeoff and landing. Common types include the wind sock, wind tee, and tetrahedron, typically placed near the runway in a segmented circle and visible from the air during traffic pattern entry.
Context Anchor
Seen near runways, ramps, or airport segmented circles, especially at airports without a control tower or when checking local surface wind visually.