| Abbreviation | Definition |
|---|---|
| LUPD | Lehigh University Police Department |
| LUPD | Lewis University Police Department |
| LUPD | Longwood University Police Department |
| LVPD | La Verne Police Department |
| LVPD | Las Vegas Police Department |
| LWBS | Left Without Being Seen |
| LYCPB | London Youth Crime Prevention Board |
| M | Misdemeanor |
| M.O. | modus operandi [Lat. method of operation] |
| MACC | Military Aid to the Civil Community |
| MACOP | Montana Association of Chiefs Of Police |
| MAD | Motivated, Aggressive, Determined |
| MAFF | Ministry of Agriculture, Fisheries, and Food |
| MAGA | Many Are Getting Arrested |
| MAIB | Marine Accident Investigation Branch |
| MAPP | Minority And Police Partnership |
| MAPPA | Multi-Agency Public Protection Arrangements |
| MAPPP | Multi Agency Public Protection Panel |
| MARCH | Multiple Agency Response to Community Hot-spots |
| MASH | Multi-Agency Safeguarding Hub |