We all know that language is not possible without a mind. However, there are different ways in which language involves mental activity. The focus of the volume presented here will be precisely on one of those ways, in which the lexicon is the guiding principle of linguistic activity. This volume presents a selection of contributions around the topic of 'language, mind and the lexicon' which were part of the discussions at the fourth biannual conference of the Spanish Cognitive Linguistics Association, held in Saragossa (Spain) in 2004. The lexicon is a very important part of any contemporary linguistic model nowadays. This is clearly so because the lexicon has the meaning elements that are combined in any linguistic expression to form the final message and constitutes the list of entry points to the knowledge database that is our long-term mental storage. But it is more clearly so because in the last decades it has been discovered that, in addition, the lexicon also stores combinatorial and procedural properties that are important for the construction and interpretation of linguistic messages. However, the focus here will be more on the lexicon as an interface between mind activity and the linguistic message in terms of meaning, which can be of many kinds. (Iraide Ibarretxe-Antuñano, Carlos Inchaurralde, and Jesús M. Sánchez-García).