This Social Performance Glossary includes terms and definitions necessary to understand the social performance of microfinance institutions. In addition to terms and definitions related to social performance, the glossary also provides terms and definitions necessary to understand microfinance, financial institutions, and institutional performance in general. The purpose of the glossary is to facilitate common understanding of key terms and concepts in microfinance and social performance among industry stakeholders and thereby enable stakeholders to act more productively and collaboratively to achieve high levels of social performance, both on an institution-by-institution basis and in the industry as a whole.