| Acronym | Definition |
|---|
| OMM | Organisation Météorologique Mondiale (French: World Meteorological Organization) |
| OMM | Organización Meteorológica Mundial (Spanish: World Meteorological Organization) |
| OMM | Organizzazione Meteorologica Mondiale |
| OMM | Original Mountain Marathon (UK) |
| OMM | Osteopathic Manipulative Medicine |
| OMM | Order of Military Merit |
| OMM | Osteopathic Manual Medicine |
| OMM | Online Macromolecular Museum |
| OMM | Orbiter Major Modification (NASA) |
| OMM | Offshore Minerals Management Program |
| OMM | Officer of the Order of Military Merit |
| OMM | On My Machine |
| OMM | Overlord Mata Muram (gaming, Everquest) |
| OMM | Operation and Maintenance Manual |
| OMM | Optical Micro-Machines, Inc. |
| OMM | O'Melveny and Myers (law firm) |
| OMM | Over Mint-Mark |
| OMM | Orbiter Maintenance and Modification (NASA) |
| OMM | Operational Maturity Model |
| OMM | Orthogonal Multipulse Modulation |
| OMM | Open Mediation Manager |
| OMM | Operations and Materials Management |
| OMM | Officer Mobilization Model |
| OMM | Organizational Maintenance Manual |
| OMM | Orbital Maintenance Mission |
| OMM | Organizational Mastery Methodology (Stanford Advanced Project Management) |
| OMM | One Man Mafia (online game) |
| OMM | On-board Mission Management |
| OMM | Operations Management Meeting |
| OMM | Open Music Model |
| OMM | Optical Media Module |
| OMM | Outbound Message Manager |
| OMM | Outgoing Message Manager |