Subject-thematic and genre aspects of linguistic definition of discourse

The article is devoted to the study of discourse from a linguistic approach within which discourse may be considered either as a collection of texts, as a verbal expression or as a word the way it is used in a particular culture throughout the history. The interaction between rational and irrational nature of language serves as a basis for these three approaches. The author states that the irrational part of language may be named with the term “discourse”. However, the irrational factor in linguistics matters only when it corresponds with the rational factor (rational functions of language). As such interaction occurs, linguistic and text processes tend to expose completely