Source : Webster's Revised Unabridged Dictionary (1913)

Graph \Graph\, n. [See {-graph}.] (Math.)
   1. A curve or surface, the locus of a point whose
      co["o]rdinates are the variables in the equation of the
      locus.

   2. A diagram symbolizing a system of interrelations by spots,
      all distinguishable from one another and some connected by
      lines of the same kind.

Source : WordNet®

graph
     n : a drawing illustrating the relations between certain
         quantities plotted with reference to a set of axes [syn:
         {graphical record}]

graph
     v 1: represent by means of a graph; "chart the data" [syn: {chart}]
     2: plot upon a graph

Source : Free On-Line Dictionary of Computing

graph
     
        1.  A collection of {nodes} and {edges}.
     
        See also {connected graph}, {degree}, {directed graph}, {Moore
        bound}, {regular graph}, {tree}.
     
        2.  A visual representation of algebraic equations
        or data.
     
        (1996-09-22)