Abstract
The paper deals with two semiotic entities – a concept and a notion, which are considered ambiguous in modern linguistic and philosophical researches. The purpose of the work is to analyze the relations of a concept and a notion on the example of linguistic signs of juristic communication area. The paper considered two polar points of view on the relations of a concept and a notion. The author notes that some researchers identify these notions proceeding from the etymology of these words and contextual substitutability, while others, and the cognitive linguistics representatives as well, distinguish between them basing on the works by Plato, Aristotle and medieval scholastics who made a distinction between sense and rational knowledge. The author relies upon the theory developed by A.M. Kaplunenko who speaks about the evolution of knowledge forms – from the concept to the term. The author makes the conclusion about the necessity to distinguish between a concept and a notion according to the degree of agreement of the characteristics attributed to the object or phenomenon under consideration. The notion is considered as a mental unit with clear semantic boundaries, while the concept is a vague semantic entity bearing both the natural reasoning knowledge appropriate for the notion and the phenomenological feelings based on the individual experience and personal knowledge.