Definitions of vane:

• noun:   the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
• noun:   a metal fin attached to the tail of a bomb or missile in order to stabilize or guide it
• noun:   flat surface that rotates and pushes against air or water
• noun:   mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
• name:  A surname (very rare: popularity rank in the U.S.: #30961)