The article analyzes the main defi nitions of the concept of „language norm“ by domestic and foreign linguists of the early 20–21st centuries. Thus, the dichotomy of F. de Saussure “language” and “speech” is considered, on the basis of which most studies of the concept of “norm” were built. The defi nitions of the norm given by E. Coseriu, representatives of the Prague Linguistic Circle are analyzed. The social and dynamic nature of the language norm is revealed in the defi nitions of Russian scientists: A. M. Peshkovsky, S. I. Ozhegov, D. N.