This monograph is devoted to the study of Turkic-Slavic language contacts at the turn of the century (from the 11th to the 21st centuries) and a systematic description of Turkic borrowings in Russian, the processes of their adaptation at different language levels. In the book, for the first time in a large diachronic period (the turn of the 11th-beginning of the 21st centuries), Turkisms are described in terms of their derivational potential, pragmatic orientation, features of the formation of the semantic structure, intra- and extralinguistic factors of variation, as well as lexicographic marking. For students, graduate students and teachers of philological faculties of universities.