This chapter offers an overview of Ronald Langacker's Cognitive Grammar (CG), with special reference to the relation between CG and constructionist approaches. It explains that although CG was developed prior to constructionist approaches, it shares many assumptions with them. CG views language as being grounded in embodied human experience and language-independent cognitive processes, and it assumes grammar to be inherently meaningful, and that language consists of form-meaning pairings or assemblies of symbolic structures. The chapter also addresses the relation between lexemes and constructions and discusses semantic and grammatical roles in CG.