This dictionary presents and explains the key words and concepts in Locke's thought and books. Over 130 entries include accounts of his various books, his place in science and religion and his writings on education, theology and economics. The dictionary should make Locke's thought accessible to specialist and non-specialist readers alike. The concepts and terms are taken from the full range of his publications and the dictionary is based on all that he published, including his correspondence. Each "Blackwell Philosopher Dictionary" presents the life and work of an individual philosopher in a scholarly yet accessible manner. Entries cover key ideas and thoughts, as well as the main themes of the philosopher's work. A comprehensive biographical sketch is also included. It is aimed at undergraduates in philosophy.