| Acronym | Definition |
|---|
| MGR | Manager |
| MGR | Monseigneur |
| MGR | Metal Gear Rising (game) |
| MGR | Media Group |
| MGR | Merry-Go-Round (train, bulk coal haulage) |
| MGR | Magister (Polish university degree) |
| MGR | Mgarr (postal locality, Malta) |
| MGR | MG Rover Group (British car manufacturer; Longbridge, UK) |
| MGR | Military Grid Reference |
| MGR | Mac Graphics |
| MGR | McGuire Global Recruitment (Bowie, MD) |
| MGR | Michael, Gabriel and Raphael (archangels) |
| MGR | M. G. Ramachandran (politician in Tamil Nadu, India) |
| MGR | Marine Genetic Resource |
| MGR | Music Gear Review (website) |
| MGR | Murmurs, Gallops, or Rubs |
| MGR | Monthly Gross Rake (online poker) |
| MGR | Major Gene Resistance |
| MGR | Medical Group Resources |
| MGR | MTI Ground Radar |
| MGR | Magnoporthe Grissa Repeat |
| MGR | Multistep Gradual Rounding |
| MGR | Minimal Global Routing |