John Sinclair’s work is widely known and has had a far-reaching influence, particularly in the areas of corpus linguistics, lexis, phraseology, lexicography, grammar, and discourse analysis. This collection of papers, written by former colleagues at Birmingham University, looks at some key writings by John Sinclair, with the intention of showing why his ideas are of lasting significance. Contributions deal with the Cobuild Project (directed by Sinclair) and its innovative first dictionary; collocation and the Open Choice and Idiom Principles; the interactions between and interdependence of phraseology and grammar; semantic prosody; and the construction of meaning in text. This volume was originally published as a Special Issue of International Journal of Corpus Linguistics 12:2 (2007).