AAA or triple-A has multiple meanings, including:

• A code or designation for
  • AAA battery, a standard size of dry-cell battery
  • The highest level of play in minor league baseball in North America
  • the highest rating given to financial bonds, AAA or Aaa

• An abbreviation for:
  • AAA proteins (ATPases Associated with various cellular Activities), a protein superfamily
  • Abdominal aortic aneurysm
  • Aces of ANSI Art, an ANSI art group during the 1990s
  • Adult album alternative a radio format
  • Advanced Amphibious Aircraft
  • Against All Authority, a punk band
  • Agricultural Adjustment Act of 1933
  • American Affordable Aircraft
  • American Airlines Arena
  • American Anthropological Association
  • American Arbitration Association
  • American Automobile Association, officially known as "AAA" since 2002
  • Anti-aircraft artillery
  • Ariana Afghan Airlines
  • ASCII Adjust after Addition, an Intel 80x86 processor instruction
  • Asistencia Asesoría y Administración, a lucha libre professional wrestling promotion in Mexico
  • Access All Areas, Sony music project
  • Access Approval Authority
  • Accumulated Adjustments Account, in US Federal Income Tax
  • Acquisition Approval Authority
  • Action Awareness Alert
  • Adaptive Array Antenna
  • Administration, Authorization, and Authentication, in software security
  • Advanced Acoustic Array
  • AEGIS Acquisition Agent
  • Aerospace Engineering, Applied Mechanics, and Aviation
  • Age Anaesthesia Association
  • Agricultural Adjustment Administration
  • Air Avenue of Approach
  • Airborne Array Aperture
  • Airborne Assault Area
  • Aircraft Alert Area
  • Airport Airspace Analysis
  • Alaska Activities Adventures Plus Tours
  • Alianza Anticomunista Argentina
  • Allied Artists' Association
  • Allocations, Assessments, and Analysis
  • Alternate Assembly Area
  • Amateur Athletics Association
  • American Abstract Artists
  • American Academy of Actuaries
  • American Academy of Addictionology
  • American Academy of Advertising
  • American Academy of Audiology
  • American Accounting Association
  • American Allergy Association
  • American Ambulance Association
  • American Armwrestling Association
  • American Association of Anatomists
  • American Audit Associates
  • Americas Army Addicts (a clan for the computer game America's Army)
  • Analog/Analog/Analog, an audio CD format, recording/mixing/mastering
  • Angle Angle Angle, a geometric proof
  • ANSI Artists of America
  • Antiaircraft Antiarmor , a weapon)
  • Anticipative Adaptive Array , in frequency-hopping communications
  • Antique Airplane Association
  • Antique Automobile Association
  • Anygame Anytime Anyplace (gaming clan)
  • Appraisers Association of America
  • Area Agency on Aging
  • Arkansas Ambulance Association
  • Arrival and Assembly Area
  • Army Audit Agency
  • Aromatic Amino Acid
  • Assign Alternate Area
  • Association of Avatar Artists
  • Astronaut-Actuated Abort
  • Atheist and Agnostic Association
  • Attitude, Awareness and Accountability, a ski safety program
  • Australian Association of Accountants
  • Australian Automobile Association
  • Authentication, Authorization, and Accounting, in computer networks
  • Authorization Accounting Activity
  • Authorized Accounting Activity
  • Automated Airlift Analysis
  • Autoridad de Acueductos y Alcantarillados (Aqueduct and Sewer Authority, Puerto Rico)
  • Awaiting Aircraft Availability