| Acronym | Definition |
|---|
| AAAA | American Association of Advertising Agencies |
| AAAA | Army Aviation Association of America |
| AAAA | Addis Ababa Action Agenda (United Nations) |
| AAAA | Battery Size |
| AAAA | American Association for Affirmative Action |
| AAAA | American Academy of Adoption Attorneys (Washington, DC) |
| AAAA | Australian Automotive Aftermarket Association |
| AAAA | American Association of Amateur Astronomers |
| AAAA | Alliance for Aviation Across America (Washington, DC) |
| AAAA | Authentication, Authorization, Accounting, and Address (Internet infrastructure) |
| AAAA | Albuquerque Aerostat Ascension Association (Albuquerque, New Mexico) |
| AAAA | Asociación Argentina Amigos de la Astronomía (founded in Buenos Aires, Argentina in 1929) |
| AAAA | Association of American Advertising Agencies (New York, NY) |
| AAAA | Authentication, Authorization, Accounting and Auditing (remote access security approach that controls network access) |
| AAAA | Aerial Agricultural Association of Australia |
| AAAA | Associated Actors and Artistes of America |
| AAAA | Alamo Area Aquatic Association (San Antonio, TX) |
| AAAA | Association of Area Agencies on Aging |
| AAAA | Atlanta Area Aquarium Association |
| AAAA | Asian Academic Accounting Association |
| AAAA | Asian American Arts Alliance |
| AAAA | Association for Applied Animal Andrology |
| AAAA | Asian Amateur Athletic Association |
| AAAA | Always Afloat Always Accessible (shipping) |
| AAAA | Akron Area Arts Alliance (Ohio) |
| AAAA | American Association Against Acronyms :-) |
| AAAA | Association of Accredited Advertising Agents Malaysia |
| AAAA | African American Adoption Agency (Roseville, MN) |
| AAAA | American Association for the Advancement of Atheism |
| AAAA | Association of Accredited Advertising Agencies |
| AAAA | Amateur Athletic Association of America |
| AAAA | American Academy of Anesthesiologists Assistants |
| AAAA | Anonymous Acronym Abuse Association |
| AAAA | Antique Advertising Association of America (Petersburg, IL) |
| AAAA | Arrowhead Area Agency on Aging (Duluth, MN) |
| AAAA | American Association of Amateur Arborists |
| AAAA | Australian Association of Advertising Agencies |
| AAAA | Aroostook Area Agency on Aging (Maine) |
| AAAA | Advanced Architectures for Airborne Arrays |
| AAAA | Amicale Azuréenne des Amateurs d'Alpine (French car club) |
| AAAA | Atelier Accessoires Automobiles Anciennes (French: Old Automobiles Accessories Workshop; auto parts manufacturer; Beychac-et-Caillau, France) |
| AAAA | American Academy Alumni Association, Inc. |
| AAAA | Arizona Academic Administrators Association |
| AAAA | Alabama Accumulated Adjustment Account (Alabama Income Tax Form 20S) |
| AAAA | Ajax Antique Arms Association (Ajax, ON, Canada) |
| AAAA | Ajoittain Aivokuollut Ajanvietto Armeija (Finnish: Occasionally Brain-dead Pastime Army; gaming clan, BF1942) |
| AAAA | All Ateneo Alumni Alliance (Ateneo de Naga University) |
| AAAA | Association Amie de l'Automobile Ancienne (French vintage automobile association) |