Source : Webster's Revised Unabridged Dictionary (1913)

Gable \Ga"ble\, n. [OE. gable, gabil, F. gable, fr. LL. gabalum
   front of a building, prob. of German or Scand. origin; cf.
   OHG. gibil, G. giebel gable, Icel. gafl, Goth. gibla
   pinnacle; perh. akin to Gr. ? head, and E. cephalic, or to G.
   gabel fork, AS. geafl, E. gaffle, L. gabalus a kind of
   gallows.] (Arch.)
   (a) The vertical triangular portion of the end of a building,
       from the level of the cornice or eaves to the ridge of
       the roof. Also, a similar end when not triangular in
       shape, as of a gambrel roof and the like. Hence:
   (b) The end wall of a building, as distinguished from the
       front or rear side.
   (c) A decorative member having the shape of a triangular
       gable, such as that above a Gothic arch in a doorway.

   {Bell gable}. See under {Bell}.

   {Gable roof}, a double sloping roof which forms a gable at
      each end.

   {Gable wall}. Same as {Gable}
   (b) .

   {Gable window}, a window in a gable.

Source : WordNet®

gable roof
     n : a double sloping roof with a ridge and gables at each end
         [syn: {saddle roof}, {saddleback}, {saddleback roof}]