[1] : The Collaborative International Dictionary of English v.0.48

weatherboarding \weath"erboard`ing\, n. arch.
   a the covering or siding of a building, formed of boards
       lapping over one another, to exclude rain, snow, etc.
   b boards adapted or intended for such use.
       1913 webster

[2] : WordNet (r) 2.0

weatherboarding
     n : a long thin board with one edge thicker than the other; used
         as siding by lapping one board over the board below syn:
          clapboard, weatherboard
see also:
clapboard weatherboard 

Weatherboarding >> W Words
Weatherboarding, definition of term: Weatherboarding
weatherboarding_pag1.html