Since the publication of his Introduction to Theoretical Linguistics (1968), Sir John Lyons became one of the most important and internationally renowned contributors to the study of linguistics. In a career which spanned several decades, he addressed himself to a broad range of issues of fundamental importance and is particularly noted for his seminal two-volume work, Semantics (1977). This volume, which is edited with an introduction by F. R. Palmer, gathers together a collection of essays by distinguished scholars on topics related to Lyons's work. In a concluding essay, Lyons responds to the contributors and reflects on the intellectual underpinning of his own work.