| Acronym | Definition |
|---|
| MON | Monday |
| MON | Motor Octane Number (gasoline) |
| MON | Monitor |
| MON | Montreal, Canada |
| MON | Monument |
| MON | Middle of Nowhere |
| MON | Monetary |
| MON | Monsanto (stock symbol) |
| MON | Monmouthshire (Welsh County) |
| MON | Monash University |
| MON | Master of None |
| MON | Monocytes |
| MON | Ministerstwo Obrony Narodowej |
| MON | Monitoring |
| MON | Museu Oscar Niemeyer |
| MON | Miscellaneous Organic NESHAP |
| MON | Monon Railroad |
| MON | Maniacs of Noise (band) |
| MON | Memorandum Of Notification |
| MON | Mixed Oxides of Nitrogen |
| MON | Margine Operativo Netto (Italian: Earnings Before Interest and Taxes) |
| MON | Muaythai Organisatie Nederland |
| MON | Management Overlay Networks |
| MON | Marine Observation Network (NOAA Data Buoy System) |
| MON | Metro-Optical Network |
| MON | Member of the Order of Niger |
| MON | Mean Order Number |
| MON | Multiple Oxides of Nitrogen (rocket fuels) |
| MON | Multiservice Optical Networking |