I-VI -- Preface -- Introduction -- Synonymy and its Role in Monolingual Lexicography -- Thinking about Dictionaries: Current Problems -- Languages for Special Purposes in the Monolingual Dictionary: Criticism, Provocations, and Practical and Pragmatic-oriented Suggestions -- On the Meaning Explanation of Sentence Adverbs in Monolingual Dictionaries. A Contribution to Practical Lexicology -- Synonyms Appearing in Major Alphabetical Dictionaries of Contemporary German -- A New Theory of the So-called Lexicographic Definition -- Elements of a Theory towards a So-called Lexicographic Definition -- Are Most of the Cumulative Dictionaries of Synonyms really Useless Bestsellers? -- On the Distinction between Semantic and Encyclopaedic Data in Domain-specific Dictionaries -- Epilogue -- Literature