| Acronym | Definition |
|---|
| FMX➣Fax Modem Switch |
| FMX➣Freestyle Motorcross |
| FMX➣FM Transmitter |
| FMX➣First Meta Exchange (gaming currency) |
| FMX➣Full Mouth X-rays (dental) |
| FMX➣Fleet Message Exchange |
| FMX➣Frequency Modulation Extended-Range (transmission system) |
| FMX➣Fleet Management Expansion (program directed by the Vice Chief of Staff, Army) |