The Collaborative International Dictionary of English v.0.48:

Modeling \Mod"el*ing\, n. (Fine Arts)
   The act or art of making a model from which a work of art is
   to be executed; the formation of a work of art from some
   plastic material. Also, in painting, drawing, etc., the
   expression or indication of solid form. [Written also
   modelling.]
   [1913 Webster]

   Modeling plane, a small plane for planing rounded objects.


   Modeling wax, beeswax melted with a little Venice
      turpentine, or other resinous material, and tinted with
      coloring matter, usually red, -- used in modeling.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Model \Mod"el\, v. t. [imp. & p. p. Modeledor Modelled; p.
   pr. & vb. n. Modeling or Modelling.] [Cf. F. modeler, It.
   modellare.]
   To plan or form after a pattern; to form in model; to form a
   model or pattern for; to shape; to mold; to fashion; as, to
   model a house or a government; to model an edifice according
   to the plan delineated.
   [1913 Webster]

WordNet (r) 3.0 (2006):

modelling
    n 1: a preliminary sculpture in wax or clay from which a
         finished work can be copied [syn: modeling, modelling,
         molding, moulding]
    2: the act of representing something (usually on a smaller
       scale) [syn: model, modelling, modeling]

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

model
modelling

   1.  A description of observed or predicted
   behaviour of some system, simplified by ignoring certain
   details.  Models allow complex systems, both existent and
   merely specified, to be understood and their behaviour
   predicted.  A model may give incorrect descriptions and
   predictions for situations outside the realm of its intended
   use.  A model may be used as the basis for simulation.

   Note: British spelling: "modelling", US: "modeling".

   (2008-04-28)

   2.  The core part of a Model-View-Controller or
   similar software architecture; the part that stores the data and
   runs the business rules or algorithms.

   (2014-11-27)