This document, which is designed to help individuals entering adult education graduate programs in North America, contains definitions of nearly 538 contemporary adult education-related terms and practitioners. The terms included were selected based on a review of more than half of the 139 papers published in the proceedings of the 41st Annual Adult Education Research Conference in Vancouver, British Columbia. For each word, the author composed a definition by reading article references, reviewing other literature, and searching online dictionaries and encyclopedias. The draft definitions were then sent to conference presenters and participants with requests for review, correction, and comments. Most entries cite one or more authors from the aforementioned proceedings. The dictionary contains a wide variety of terminology, including the following: acronyms and abbreviations; brief overviews of the activities and/or theories of prominent adult education practitioners and theorists; terms related to various types and levels of adult learning; terms related to types and theories of learning; terms related to research methodology; terms related to educational philosophy and teaching methodology; and terms related to social theories. (Contains 100 references). (MN)