Applied linguistics is a multidisciplinary subject which concerns with the study of linguistic structures and functions in a language and its role in communication. It delves into the study of interaction between a language with its surrounding cultural and social factors. This book provides significant information of this discipline to help develop a good understanding of philosophy of language, anthropology, cultural exchange and diverse applications of this field. Some selected researches and case-studies that redefine applied linguistics have been presented in this book. The book is meant to provide a comprehensive overview of applied linguistics to the students, researchers and academicians alike.