vane meaning and definition

VANE noun

Definition of vane (noun)

1. mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
   • synonyms: weather vane, weathervane, 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
   • synonyms: blade
4. the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
   • synonyms: web