AbstractThe aim of the conceptual paper is to deal with the different meanings of competition, to systemize the versions of concepts of competition arranging these in the same unifying framework, called in this paper the field of competition, and developed in this paper. The unified concept of competition is developed showing of how its meaning depends on the objective(s) of the agents in competitive process. It can be used as the modelling device for analysis. Competition and competitiveness are the terms frequently used both in business and public discussion about the economic units, and about their ability to perform according to the strategic or policy goals. However, the meaning of the terms remain vague and to make things even more co...