| Acronym | Definition |
|---|
| MUM | Mumbai (Bombay), India |
| MUM | Maharishi University of Management |
| MUM | Mensch und Maschine (German: Man and Machine; software) |
| MUM | Museum of Menstruation and Women's Health (website) |
| MUM | Mobile and Ubiquitous Multimedia (conference) |
| MUM | Miss You More |
| MUM | Multi User Maze |
| MUM | Mobile Agent Based Ubiquitous Multimedia Middleware |
| MUM | Multi-Unit Manager |
| MUM | Manned and Unmanned (US Army) |
| MUM | Managing Uncertainty in Medicine |
| MUM | Mera Urdu Messenger |
| MUM | Mapserver Users Meeting |
| MUM | Mass United Movement (South Africa) |
| MUM | Maximum Useful Magnification |
| MUM | Multi Use Message |
| MUM | Monthly Update Meeting |
| MUM | Multiplexer Uplink Module |
| MUM | Meters Uber Meer (German: meters above sea level) |
| MUM | Multi Use Manuscript |