abbreviation for Metro-Goldwyn-Mayer Corporation: a large American motion picturecompany founded in 1924 when Goldwyn Pictures merged with the Metro Studio and Louis B. Mayer Pictures. It had the motto "more stars than there are in the heaven" and was responsible for the production of many, many successful movies until the 1970s when it gave up movie-making. —PDC Volume 1 Approved Glossary