A Guide to Practical Online Lexicography provides a step-by-step course on digital lexicography, discussing state-of-the-art theoretical lexicography and offering a guide to practical lexicography, with a focus on monolingual online dictionaries. Dictionaries today need to be designed and made for online environments, use up-to-date technologies in all aspects of lexicography, and have adequate business models in place for financing them. This book: • Covers lexicographic data and categories of existing online dictionaries, and shows how to plan, analyse, and store data. • Discusses the relationship between technology, dictionary users and dictionary makers, lexicographic developments, and economic costs. • Provides an in-depth case study of designing and making the Diccionario Digital del Español (DIDES), an online dictionary of Spanish edited by the author. • Includes further reading recommendations, practical activities, and questions for discussion at the end of each chapter. Drawing on materials developed by the author from his experience of over 20 years of lecturing in universities and institutions globally, this is a practical go-to guide to online lexicography for students of lexicography, e-lexicographers and researchers.