Process art is an artistic movement as well as a creative sentiment where the end product of art and craft, the objet d’art, is not the principal focus. The 'process' in process art refers to the process of the formation of art: the gathering, sorting, collating, associating, patterning, and moreover the initiation of actions and proceedings. Process art is concerned with the actual doing and how actions can be defined as an actual work of art; seeing the art as pure human expression. Process art often entails an inherent motivation, rationale, and intentionality. Therefore, art is viewed as a creative journey or process, rather than as a deliverable or end product.
(this definition is from Freebase)