Definitions

1. proper noun

The Metro-Goldwyn-Mayer, an American media conglomerate and major film studio.

“The movie was produced by MGM studios.”

2. abbreviation

An abbreviation for milligram, a unit of mass or weight in the International System of Units.

“The medication contained 10 mgm of the active ingredient.”

3. initialism

A three-letter initialism for the Motion Picture Group of Metro-Goldwyn-Mayer.

“The MGM logo appeared at the beginning of the film.”