Source : Webster's Revised Unabridged Dictionary (1913)

Vane \Vane\, n. [OE. & E. Prov. E. fane weathercock, banner, AS.
   fana a banner, flag; akin to D. vaan, G. fahne, OHG. fano
   cloth, gund fano flag, Icel. f[=a]ni, Sw. fana, Dan. fane,
   Goth. fana cloth, L. pannus, and perhaps to Gr.? a web, ? a
   bobbin, spool. Cf. {Fanon}, {Pane} a compartment, panel.]

Source : WordNet®

vane
     n 1: flat surface that rotates and pushes against air or water
          [syn: {blade}]
     2: mechanical device attached to an elevated structure; rotates
        freely to show the direction of the wind [syn: {weathervane},
         {weather vane}, {wind vane}]
     3: a metal fin attached to the tail of a bomb or missile in
        order to stabilize or guide it
     4: the flattened weblike part of a feather consisting of a
        series of barbs on either side of the shaft [syn: {web}]