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1. Mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
   - weathervane, weather vane, wind vane
    
2. A fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it
    
3. Flat surface that rotates and pushes against air or water
   - blade
    
4. The flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
   - web

Sounds like: vails, valesn, van

Derived forms: vanes

Type of: blade, fin, mechanical device, rotating mechanism

Part of: aerogenerator, arrow, chopper [informal], copter [informal], eggbeater [N. Amer, informal], helicopter, missile, oar, plume, propeller, propellor, turbine, whirlybird [N. Amer, informal], wind generator, windmill

Encyclopedia: Vane, John