This meaning refers to a freely rotating object that aligns itself with the direction of the wind.
The weather vane pointed east.
A metal vane turned on the roof.
This technical meaning refers to a blade in turbines, pumps, fans, compressors, and other machines that interacts with air, water, steam, or gas.
Each turbine vane redirects the hot gas.
The pump contains several rotating vanes.
This biological meaning refers to the broad flat surface of a feather formed by interlocking barbs.
The feather's vane was smooth and symmetrical.
Tiny barbs form each side of the vane.
