vane (n.)mechanical device attached to an elevated structure; rotates freely to show the direction of the wind;
Synonyms: weathervane / weather vane / wind vane
vane (n.)a fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it;
vane (n.)flat surface that rotates and pushes against air or water;
vane (n.)the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft;
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