What is Modeling?

Modeling definition and meaning on Dictionary terms:
the act, art, or profession of a person who models.
the process of producing sculptured form with some plastic material, as clay.
the technique of rendering the illusion of volume on a two-dimensional surface by shading.
the treatment of volume, as the turning of a form, in sculpture.
the representation, often mathematical, of a process, concept, or operation of a system, often implemented by a computer program.
Also called imitation. Psychology. therapy in which a particular behavior is elicited by the observation of similar behavior in others.