The Collaborative International Dictionary of English v.0.48:

Crayon \Cray"on\ (kr?"?n), n. [F., a crayon, a lead pencil
   (crayon Cont['e] Cont['e]'s pencil, i. e., one made a black
   compound invented by Cont['e]), fr. craie chalk, L. creta;
   said to be, properly, Cretan earth, fr. Creta the island
   Crete. Cf. Cretaceous.]
   1. An implement for drawing, made of clay and plumbago, or of
      some preparation of chalk, usually sold in small prisms or
      cylinders.
      [1913 Webster]

            Let no day pass over you . . . without giving some
            strokes of the pencil or the crayon.  --Dryden.
      [1913 Webster]

   Note: The black crayon gives a deeper black than the lead
         pencil. This and the colored crayons are often called
         chalks. The red crayon is also called sanguine. See
         Chalk, and Sanguine.
         [1913 Webster]

   2. A crayon drawing.
      [1913 Webster]

   3. (Electricity) A pencil of carbon used in producing
      electric light.
      [1913 Webster]

   Crayon board, cardboard with a surface prepared for crayon
      drawing.

   Crayon drawing, the act or art of drawing with crayons; a
      drawing made with crayons.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crayon \Cray"on\, v. t. [imp. & p. p. Crayoned (-?nd); p. pr.
   & vb. n. Crayoning.] [Cf. F. crayonner.]
   To sketch, as with a crayon; to sketch or plan.
   [1913 Webster]

         He soon afterwards composed that discourse, conformably
         to the plan which he had crayoned out.   --Malone.
   [1913 Webster]

WordNet (r) 3.0 (2006):

crayon
    n 1: writing implement consisting of a colored stick of
         composition wax used for writing and drawing [syn:
         crayon, wax crayon]
    v 1: write, draw, or trace with a crayon

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "crayon":
   air brush, art paper, black and white, brouillon, brush,
   camera lucida, camera obscura, canvas, cartoon, chalk, charcoal,
   charcoal drawing, chiaroscuro, delineation, design, diagram,
   doodle, draft, drawing, drawing paper, drawing pencil, drier,
   easel, ebauche, esquisse, fixative, graph, ground, lay figure,
   line drawing, maulstick, medium, paint, paintbrush, palette,
   palette knife, pastel, pen-and-ink, pencil, pencil drawing,
   pigments, rough copy, rough draft, rough outline, scratchboard,
   siccative, silhouette, silver-print drawing, sinopia, sketch,
   sketchbook, sketchpad, spatula, spray gun, study, stump, tracing,
   varnish, vignette



The Free On-line Dictionary of Computing (30 December 2018):

crayon

   1. Someone who works on Cray supercomputers.  More
   specifically, it implies a programmer, probably of the CDC
   ilk, probably male, and almost certainly wearing a tie
   (irrespective of gender).  Systems types who have a Unix
   background tend not to be described as crayons.

   2. A computron that participates only in number crunching.

   3. A unit of computational power equal to that of a single
   Cray-1.  There is a standard joke about this usage that
   derives from an old Crayola crayon promotional gimmick: When
   you buy 64 crayons you get a free sharpener.

   [Jargon File]

   (1994-10-13)