Part I. Introduction.- Editors' Conceptual spaces at work; Peter Gärdenfors and Frank Zenker.- Part II. Semantic Spaces.- From conceptual spaces to predicates; Jean-Louis Dessalles.- Conceptual spaces at work in sensory Domains, dimensions and distances; Carita Paradis.- Conceptual spaces, features and word The case of Dutch shirts; Joost Zwarts.- Meaning negotiation; Massimo Warglien and Peter Gärdenfors.- Part III. Computing Meanings.- How to talk to each other via Semantic interoperability as conceptual imitation; Simon Scheider and Werner Kuhn.- Self-organization of conceptual spaces from quality dimensions; Paul Vogt.- Conceptual spaces and computing with words; Janet Aisbett, John Rickard and Greg Gibbon.- Logical, Ontological and cognitive aspects of objects types and trans-world identity with applications to the theory of conceptual spaces; Giancarlo Guizzardi.- A cognitive architecture for music perception exploiting conceptual spaces; Antonio Chella.- Part IV. Philosophical Perspectives.- Conceptual spaces as philosophers' tools; Lieven Decock and Igor Douven.- Specification of the unified conceptual space, for purposes of empirical investigation; Joel Parthemore.- A perspectivist approach to conceptual spaces; Mauri Kaipanen and Antti Hautamäki.- Communication, rationality, and conceptual changes in scientific theories; Frank Zenker and Peter Gärdenfors.