This book defines and explains some 40 key concepts in adult education and training, and it presents an analysis of the more than 150 concepts that can be made by combining core and qualifying concepts. The concepts have been grouped into seven chapters, with the following core concepts discussed in chapter 1: adult, education, and training, plus the related ideas of learning, teaching, and development. Chapters 2-7 then examine qualifying concepts--concepts that refer to approaches to, or details of, the field as defined by the core concepts. The qualifying concepts discussed are as follows: lifelong; recurrent; further; higher; adult; and continuing; community; formal, informal, nonformal; human resource; career; professional; distance, open and flexible; experiential, independent, self-directed; knowledge and skill; capability and enterprise; competence; and quality. Chapter 7 also discusses structural concepts, such as access and participation. In each of the chapters, an analytical framework is used to illustrate the background, application, and wider context of the concepts discussed. Chapter 8, attempts an overall evaluation of the concepts examined, of the frameworks used to analyze them, and of what this says about the field of study. The book contains 458 references. (KC)