Knowledge and Discourse presents an ecological approach to the study of discourse in social, academic and professional practices. It brings together distinguished scholars from diverse cultures - India, China, Australia, Canada among others - and disciplines - linguistics, anthropology, sociology, philosophy. The chapters collectively illustrate the ecological approach by exploring how language makes connections between subjective experiences as people construct meaning and action. This book offers the reader a holistic, interdisciplinary approach to the study of language as discourse, questioning traditional views of disciplinary knowledge and the role of discourse in the pursuit, construction and compartmentalisation of such knowledge. Through the variety of disciplines, experiences and approaches, the contributors show how the world and word are contingent on each other. The notions of connectivity, contingency and change are themes that run through the book, and in the interweaving of these themes readers will find persuasive illustrations of an ecological approach to applied linguistics.