Definition of canvases:
(n) :
A type of coarse cloth, woven from hemp, useful for making sails and tents or as a surface for paintings.
(n) :
(painting) A piece of canvas cloth stretched across a frame on which one may paint.
(n) :
(computer graphics) A region on which graphics can be rendered.
(n) :
(figuratively) A basis for creative work.
(n) :
(nautical) Sails in general.
(n) :
A tent.