Preface to the German Edition. Preface to the English Edition. Notes on the Translation. Introductory Remarks. Part I. 1. Semantic Indefiniteness. 2. Prerequisites and Fundamental Concepts. 3. The Phenomenon of Precisification. 4. Vagueness and Ambiguity. Part II. 5. On the Logic of the Indefinite. 6. Precisification Semantics. Part III. 7. Vagueness and Imprecision. 8. Dynamic Semantics for Vague Expressions. Concluding Remarks. References. Statements and Definitions. Index of Names. Subject Index.