The Collaborative International Dictionary of English v.0.48:

Sketch \Sketch\, v. t. [imp. & p. p. Sketched; p. pr. & vb. n.
   Sketching.] [Cf D. schetsen, It. schizzare. See Sketch,
   n.]
   1. To draw the outline or chief features of; to make a rought
      of.
      [1913 Webster]

   2. To plan or describe by giving the principal points or
      ideas of.
      [1913 Webster]

   Syn: To delineate; design; draught; depict.
        [1913 Webster]