The book discusses vocabulary learning strategies as an integral subgroup of language learning strategies. It defines language learning strategies in general and their features on the basis of cognitive theory and relevant models of second language acquisition as the basis for empirical research. Furthermore, the book gives a survey of research on vocabulary learning strategies and describes three original empirical studies. Thus, the book attempts at integrating the approaches of theories of second language acquisition, the theory and practice of instructed foreign language learning, and the findings of current empirical research.