In 1959, the AMS published the Glossary of Meteorology. Containing 7900 terms, more than 10,000 copies have been sold over four decades through five printings. It is a tribute to the editors of that first edition that it has withstood the test of time and continued to be among the leading reference sources in meteorology and related sciences. This is the electronic version of the second edition of the Glossary with more than 12,000 terms. Along with the print version it should be the authoritative source for definitions of meteorological terms for many years to come.