| Abbreviation | Definition |
|---|---|
| A | Somebody |
| A&E | Accident and Emergency |
| A/F | Asian Female |
| A/O | Area Of |
| A/S | Arrest/Summons |
| AAA | Against All Authority |
| AACP | Arkansas Association of Chiefs of Police |
| AACPO | Alberta Association of Community Police Officers |
| AAFS | American Academy of Forensic Sciences |
| AAPD | Ann Arbor Police Department |
| AAPP | American Association of Police |
| AAPP | American Association of Police Polygraphists |
| AAPU | Attleboro Auxiliary Police Unit |
| AAWC | Automobile Accident With Casualties |
| AB | Absolute Belligerence |
| AB | Aryan Brotherhood |
| ABC | Acceptable Behaviour Contract |
| ABC | Anti-social Behaviour Contract |
| ABE | Achieving Best Evidence |
| ABEG | Achieving Best Evidence Guidelines |