Map Abbreviations (M)
| Term | Description |
| M | Mark Marsh Masonry Mead Mere Mews Miles Moat Mooring Mound Mount |
| m | Medium Metres |
| Mag Var | Magnetic Variation |
| MB | Municipl Borough |
| MD | Mound |
| Me | Mead |
| Meml | Memorial |
| met | Metalled |
| Met | Metropolitan |
| Met Sta | Meteorological Station |
| Meth | Methodist |
| MH | Malt House |
| MH | Man Hole |
| MH & MLW | Mean High and Mean Low Water |
| MH & MLWS | Mean High and Mean Low Water Springs |
| MHW | Mean High Water |
| MHWS | Mean High Water Springs |
| Misn | Mission |
| Misn Ch | Mission Church |
| Mkt | Market |
| Mkt Ho | Market House |
| MLW | Mean Low Water |
| MLWS | Mean Low Water Springs |
| Mon | Monument |
| Mortuary | Mort |
| MP | Mile Post Mooring Post |
| MPU | Mail Pick-up |
| Mr | Manor |
| MR | Mooring Ring |
| MS | Mews Mile Stone |
| MT | Mount |
| Mt | Mountain |
| Mtl Hospl | Mental Hospital |
| Multi Car Park | Multistory Car Park |
| Munl | Municipal |
| Mus | Museum |
