Culturology is a young science, however, it claims to be integrative in the system of humanitarian knowledge. One of the reasons for this is the development of our own conceptual framework, creation of its own thesaurus. The central concept of science is the concept of «culture». Today, there are several hundreds of culture definitions, which is a consequence of the variety of research methods. The term «culture» is widely used both as a word of everyday speech, and as a scientific concept. The article analyzes the practice of using the word «culture» in everyday speech, in journalism, which makes it possible to understand how the term is perceived by the public consciousness, which in turn acts as an empirical basis for a theoretical understanding of the essence of culture. For the extra-scientific practice of using the word «culture», two fundamental meanings are characteristic. Firstly, culture is understood as a certain individual integrity (national culture, art culture, religious culture, etc.); secondly, the word culture expresses the level of development of something (a culture of behavior, a culture of thinking, etc.). Moreover, the first meaning, as a rule, is limited to the field of art. The purpose of the article is to characterize the phenomenon of culture as a border separating natural being and social being. Culture is the essence of human, not natural being, it is the noumenon of society, which is a system of phenomena, each of which is a specific side of its own human being. In light of this, to consider culture only the level of positive values seems incorrect, since negative values also apply to society. Culture as a border separating the two spheres of being is the interior and exterior sides, but these are sides of a single whole, which allows us to see the unity of the natural and social in culture, and this allows us to abandon the opposition «nature — culture».