BL With a new final chapter which brings the book up to date First published in 1989, this book explores the far-reaching implications of Eleanor Rosch's seminal work on categorization and prototype theory, extending the application of prototype theory from lexical semantics to morphology, syntax, and phonology. It provides a readable and clearly articulated introduction to the field of Cognitive Linguistics. For the second edition John Taylor has added a chapter which updates the book, particularly in its treatment of lexical semantics.