| Acronym | Definition |
|---|
| BAA➣Boston Athletic Association (host of the Boston Marathon) |
| BAA➣Broad Agency Announcement |
| BAA➣British Airports Authority |
| BAA➣Basketball Association of America |
| BAA➣Baltic Aviation Academy (Lithuania) |
| BAA➣British Astronomical Association |
| BAA➣Boston Arts Academy (Boston, MA) |
| BAA➣Black or African American (population classification) |
| BAA➣Buy American Act |
| BAA➣Business Associate Agreement (HIPAA) |
| BAA➣Broadway Artists Alliance (New York) |
| BAA➣Batting Average Against (baseball) |
| BAA➣Business Achievement Award (various locations) |
| BAA➣Backing Australia's Ability |
| BAA➣British Accounting Association |
| BAA➣Broad Area Announcement |
| BAA➣British Aggregates Association (UK) |
| BAA➣Beaufort Art Association (Beaufort, SC) |
| BAA➣Bialla (Airport Code, New Guinea) |
| BAA➣Band Alumni Association (various schools) |
| BAA➣Board of Academic Advisors (various locations) |
| BAA➣Board of Adjustment and Appeals (various locations) |
| BAA➣Beta-Adrenergic Agonist (medication) |
| BAA➣Business Area Analysis |
| BAA➣Bugles Across America |
| BAA➣Baccalauréat en Administration des Affaires (French) |
| BAA➣British Agrochemicals Association |
| BAA➣British Airports Association (UK) |
| BAA➣Bloomington Athletic Association (Bloomington, MN) |
| BAA➣Bowfishing Association of America |
| BAA➣Biotechnology Association of Alabama |
| BAA➣British Aerospace Airbus (UK) |
| BAA➣Bilateral Airworthiness Agreement |
| BAA➣Bachelier en Administration des Affaires |
| BAA➣Boomerang Association of Australia |
| BAA➣Board/Authority Authorized Course (Canada) |
| BAA➣Board of Assistance Appeals |
| BAA➣Bureau d'Accompagnement Artistique (French: Bureau of Artistic Support) |
| BAA➣Backup Aircraft Authorization |
| BAA➣Banc of America Advisors, LLC |
| BAA➣Beers Across America (beer club) |
| BAA➣Bomber Alert Area |
| BAA➣Master of Orion 2: Battle At Antares (computer game) |
| BAA➣Budget Activity Account |
| BAA➣Brooklyn Art Association |
| BAA➣Brigade Administration Area |
| BAA➣Belgian Aluminium Association (Belgium) |
| BAA➣Battlefield Automation Appraisal |
| BAA➣Backup Aerospace Vehicle Authorization |
| BAA➣Business Administration and Analysis |
| BAA➣Basic Acoustic Analysis |
| BAA➣Ban All Acronyms |
baa - the cry made by sheep 
baa - cry plaintively; "The lambs were bleating"