What does "gable" mean?

Additional senses

1. 2.(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.