| Abbreviation | Definition |
|---|---|
| MFI | Median Family Income |
| MFI | Mostly Foreign Incompetence |
| MFJ | Married Filing Jointly |
| MFN | Most Favored Nation |
| MFR | Minimum Funding Requirement |
| MFS | Married Filing Separately |
| MG | Major Gaffes |
| MG | Major General - Army |
| MGA | Managing General Agency |
| MGIB-SR | Montgomery GI Bill - Selected Reserve |
| MGL | Merit GuideLines |
| MGN | Maritime Global Net |
| MGR | Manager |
| MGT | Management |
| MH | Marshall Islands |
| MHB | Medicaid Hospice Benefit |
| MHI | Medical Home Index |
| MHLS | Maritime HomeLand Security |
| MHR | Member of the House of Representatives |
| MHRP | Military HIV Research Program |