| Abbreviation | Definition |
|---|---|
| met | Meteorology |
| MET | Mechanical Engineering Technology |
| MET | Merchandising Execution Team |
| MET | Mission Elapsed Time |
| MET | Mission Events Timer |
| MET | Master Events Timer |
| MET | Medium Energy Telescope |
| META | Megachannel Extraterrestrial Assay |
| METAR | Meteorological Terminal Aviation Routine Weather Report |
| METI | Meteorological Information |
| METS | Metastases (where the tumour has spread to secondary sites) |
| MEV | Mars Excursion Vehicle |
| MEVVA | Metal Vapor Vacuum Arc |
| MEWG | Maintenance Engineering Working Group |
| MF | Method Flag |
| MF | Multifunction |
| MFA | Multi-Fibre Agreement |
| MFA | Master of Fine Arts |
| MFA | Manned Flight Awareness |
| MFA | Missouri Farmers Association |
| MFBP | Manufacturing Flow and Building Plan |
| MFC | Masters of Finance and Control |
| MFC | Merge From Current |
| MFC | Multiple Flight Controller |
| MFCV | Muscle Fiber Conduction Velocity |
| MFD | Mid Frequency Executive |
| MFD | Midforceps Delivery |
| MFD | Mandibulofacial Dysostosis |
| MFE | Master of Financial Economics |
| MFF | MDM Flight Forward |
| MFG | Major Functional Group |
| MFH | Military Funeral Honors |
| MFH | Missing From Home |
| MFH-B | Malignant Fibrous Histiocytoma Of Bone |
| MFI | Multiplex Fluorescent Immunoassay |
| MFJ | Modified Final Judgment |
| MFMR | Multifrequency Microwave Radiometer |
| MFN | Most Favoured Nation |
| MFO | Major Function Overlay |
| MFP | MonoFluoroPhosphate |
| MFP | Multifunction Printer |
| MFPA | Managed Forest Plan Approver |
| MFPA | Malaysia Fire Protection Association |
| MFPE | Misson From Planet Earth |
| MFR | Medical First Responder |
| MFR | Multifunctional Review |
| MFR | Multifunctional Receiver |
| MFR | Maximum Flight Rate |
| MFR | Manipulator Foot Restraint |
| MFS | Monetary and Financial Statistics |