This update of an earlier glossary has been compiled to help promote awareness and use of a common language of terms, definitions, and procedures at the institutional, state, and national levels in postsecondary education. It is intended for use as a reference for those who exchange or collect information throughout postsecondary education, especially those who deal with data in institutions, government agencies, and education associations. Common definitions and categories have been developed for data items most regularly used in postsecondary education. The glossary was developed partly through ongoing monitoring of national and state data-collecting efforts for both common and mandated standardizations and classifications. (Author/MSE)