The concept of dialectics from ancient times to the present is reviewed in this study. In particular, the views of scientists of ancient Greece and medieval Europe are analyzed in details; the attention is focused on the existing in modern dictionary definition of the term dialectic. The role and place of dialectics are analyzed in different fields of science including in linguistics. In modern linguistics, the dialectical semantics of word is a complex psychic component, in which the intellectual elements are dominant. In the basis of seme analysis is the concept of lexical meaning as a set of semantic components, which are smaller than the lexical meaning. The language is in the constant development, and therefore its nominative system is...