First published in 1976, the Dictionary of Philosophy has established itself as the best available text of its kind, explaining often unfamiliar, complicated and diverse terminology. Providing an illuminating and informed introduction to central philosophical issues, concepts and perspectives in the core fields of metaphysics, epistemology and philosophical logic, the Dictionary takes the most commonly-used terms and notions and clarifies what they mean to the philosopher and what sort of problems the philosopher finds associated with them. The bibliographies supply core reading lists and each entry uses extensive cross referencing to related themes and concepts to provide greater access, control and comprehension. The Dictionary also provides those working in proximate fields with an understanding of areas of overlapping interest, concepts of common applicability and the full range and diversity of philosophical analysis and insight. The third edition of this bestselling student reference book provides an illuminating and informed introduction to the key issues, concepts and perspectives of philosophy. The Dictionary has been thoroughly revised and updated.