Concepts do not exist in isolation. Within each domain of knowledge, any notion is defined in relation to other notions through various semantic relations. Terminological variation gives rise to polysemy and synonymy. Equally significant are the relationships of antonymy and hyperonymy. The paper analyzes the most important semantic relations in marketing terminology in Romanian: polysemy, homonymy, synonymy, antonymy, hyperonymy and their types. The relevant identification of semantic relations is important for the structuring of a terminographic work, for the proper ordering of concepts and for the correct drafting of specialized definitions.
