| Acronym | Definition |
|---|
| AFF | Affectionate |
| AFF | A Failing Firm |
| AFF | Aberration Free Focus |
| AFF | Above Finished Floor |
| AFF | Accelerated Free Fall (type of skydiving training) |
| AFF | Acceptance and Ferry Flight |
| AFF | Acetylaminofluorene |
| AFF | Adaptive Feed Forward |
| AFF | Adolf Fredriks Flickkör (Stockholm, Sweden) |
| AFF | Adult Freedom Foundation |
| AFF | Advance Fee Fraud |
| AFF | Advanced File Format |
| AFF | Affirmative |
| AFF | Air Freight Forward |
| AFF | Aircraft Firefighting |
| AFF | Alabama Farmers Federation (Montgomery, Alabama) |
| AFF | Always Friends Forever |
| AFF | American FactFinder (US Census data retrieval system) |
| AFF | American Folk Festival |
| AFF | American Forest Foundation |
| AFF | Animals Asia Foundation |
| AFF | Apostolic Faith Fellowship |
| AFF | Arcadian Freedom Fighters |
| AFF | Arming, Fuzing, and Firing (weapons/munitions) |
| AFF | Artificial Flat Fading |
| AFF | ASEAN Fisheries Federation |
| AFF | ASEAN Football Federation |
| AFF | Aspies for Freedom |
| AFF | Association Française des Fibromyalgiques |
| AFF | Atlantic Film Festival |
| AFF | Audit Finding Form |
| AFF | Autonomous Formation Flight |
| AFF | Autonomous Formation Flyer |
| AFF | Aviation Flight Facility |
| AFF | Colorado Springs USAF Academy United States (airport code) |
| AFF | Adobe Filter Factory |
| AFF | Advanced Forensics Format |
| AFF | Advanced Function Feature |
| AFF | Animated File Format |