Based on educational administration textbooks and on thesauri and dictionaries published by the United Nations Educational, Scientific, and Cultural Organization (UNESCO), the International Bureau of Education (IBE), and other institutions, this document presents a trilingual (English, French, and Spanish) glossary of approximately 2,500 terms or expressions in current use in educational administration. Definitions in English, French, and Spanish for about 200 of these terms are provided in a separate section. Also provided is a trilingual subject grouping of the defined terms, which are listed under: (1) education and its background; (2) systems, structures, out-of-school education, and school type, level, and modality; (3) educational planning; (4) educational administration; (5) educational personnel administration; (6) administration of the teaching-training process; (7) training of teaching and administrative personnel; (8) educational resources administration; (9) control and evaluation of the administrative process; and (10) technical aspects of administration and management. A 47-item bibliography of sources consulted concludes the document. (ESR)