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