The Collaborative International Dictionary of English v.0.48:

Delineate \De*lin"e*ate\, a. [L. delineatus, p. p. of delineare
   to delineate; de- + lineare to draw, fr. linea line. See
   Line.]
   Delineated; portrayed. [R.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Delineate \De*lin"e*ate\, v. t. [imp. & p. p. Delineated; p.
   pr. & vb. n. Delineating.]
   1. To indicate by lines drawn in the form or figure of; to
      represent by sketch, design, or diagram; to sketch out; to
      portray; to picture; in drawing and engraving, to
      represent in lines, as with the pen, pencil, or graver;
      hence, to represent with accuracy and minuteness. See
      Delineation.
      [1913 Webster]

            Adventurous to delineate nature's form. --Akenside.
      [1913 Webster]

   2. To portray to the mind or understanding by words; to set
      forth; to describe.
      [1913 Webster]

            Customs or habits delineated with great accuracy.
                                                  --Walpole.
      [1913 Webster]

WordNet (r) 3.0 (2006):

delineate
    adj 1: represented accurately or precisely [syn: delineated,
           represented, delineate] [ant: undelineated]
    v 1: show the form or outline of; "The tree was clearly defined
         by the light"; "The camera could define the smallest
         object" [syn: define, delineate]
    2: determine the essential quality of [syn: specify, define,
       delineate, delimit, delimitate]
    3: trace the shape of [syn: delineate, limn, outline]
    4: make a mark or lines on a surface; "draw a line"; "trace the
       outline of a figure in the sand" [syn: trace, draw,
       line, describe, delineate]
    5: describe in vivid detail