The development of each religious system of India being largely conditioned by its inter-connections and contradictions with others, it can be properly understood only when the vast terminological resources of each system with their many-sided suggestivity are diligently worked out from a comparative point of view. The present Glossary therefore seeks to explain the basic significance of various terms and concepts which characterize different religious systems of India and also to point out that an in-depth study of religious terminology is likely to prove the common origin of all the systems which are specifically different in their functional aspects but are generically alike. The logical, epistemological and metaphysical terms and concepts, as also those pertaining to the ritual and other aspects of religious life, originated from one primary source and these were adopted in all the religio-philosophical systems of India with necessary modifications. In view of the vastness of the material, only the more important terms have been included. However, a detailed index has been provided for cross-referencing as also for terms not included in the Glossary as separate entries. In all such cases their meanings have been furnished. The introductory portion deals with the sources along with a brief history of lexical and terminological studies and the various problems involved therein. A detailed bibliography has also been provided.