It is increasingly evident that the consistent use of standardized geographical names is an essential element of effective communication worldwide. Unambiguous nationally-endorsed names support socio-economic development, sustainable environmental management and spatial data infrastructure. This multilingual dictionary, prepared by the United Nations Group of Experts on Geographical Names, presents definitions for a common global understanding of some 375 technical terms pertaining to geographical names: their language, standardization, computer storage and cartographic use. The text for this new edition of the Glossary was compiled in English, with equivalent terms and definitions prepared, under the guidance of geographical names experts, in the other five official languages of the United Nations.