Presents a range of terms associated with the field of linguistics. It concentrates on terms which cut across subject boundaries and which are central to general linguistic theory and practice. It deliberately avoids terms which are dealt with in the other books in the series. The "Penguin English Linguistics" series offers a guide to central concepts in the various branches of linguistics. Each book outlines a branch of the subject in a way which produces a support text for lecturers, textbooks and examinations.