This concise and accessible dictionary explores the central concepts of one of the most significant figures in the history of thought. The author traces the history of 100 concepts from 'aletheia' to 'world' through Heidegger's entire career, from the earlier lectures to his later essays and seminars - including many that are not yet translated. The book is extremely user-friendly, containing a full index of the words and concepts discussed, and an introduction explaining Heidegger's use of language. A Heidegger Dictionary enables the student to read Heidegger's immensely rich and varied works with understanding, and assigns him to his rightful place in both contemporary philosophy and in the history of the subject.