| Acronym | Definition |
|---|
| BA | British Airways |
| BA | Bachelor of Arts (degree) |
| BA | Bath (postcode, United Kingdom) |
| BA | Bahrain |
| BA | Bay Area (of San Francisco) |
| BA | Bahia (Brazil) |
| BA | Buenos Aires |
| BA | Business Administration |
| BA | Bank of America |
| BA | Bosnia and Herzegovina (top-level domain name) |
| BA | Batting Average (baseball) |
| BA | Bratislava (Slovakia) |
| BA | Back Again |
| BA | Barium |
| BA | Berufsakademie (German; University of Cooperative Education) |
| BA | Business Analyst |
| BA | Bad Ass |
| BA | Bank Austria (Austrian Bank) |
| BA | Bryan Adams |
| BA | British Association |
| BA | Bioavailability |
| BA | British Association (screw thread) |
| BA | Breast Augmentation |
| BA | Baseball-Almanac |
| BA | Ben Affleck (actor) |
| BA | Beer Advocate (website) |
| BA | Bronze Age |
| BA | Bowling Alley |
| BA | Billing Address |
| BA | Bad Apples (Guns N' Roses song) |
| BA | Business Agent (labor unions) |
| BA | Bell Atlantic (telephone company; now Verizon) |
| BA | Business Aviation (charter flights) |
| BA | British Aerospace |
| BA | Bosnia Hercegovina (ISO country code) |
| BA | Bundesanstalt für Arbeit (German: federal job office) |
| BA | Breathing Apparatus |
| BA | Bombardier Aerospace (aircraft manufacturer) |
| BA | Bombs Away |
| BA | Biological Assessment |
| BA | Building Automation |
| BA | Bad Attitude |
| BA | Bibliotheca Alexandrina (Alexandria, Egypt) |
| BA | Budget Authority |
| BA | Bronchial Asthma |
| BA | Biosecurity Australia (created October 2000) |
| BA | Booksellers Association |
| BA | Basal Area |
| BA | Biological Abstracts |
| BA | Balloon Angioplasty |
| BA | Brachial Artery |
| BA | Bnei Akiva (Jewish Zionistic youth group worldwide) |
| BA | Bari, Puglia (Italian province) |
| BA | Binding Acknowledgement |
| BA | Broker Associate (real estate) |
| BA | Be-Arsed |
| BA | Bus Adapter |
| BA | Bruce Almighty (movie) |
| BA | Budget Analysis |
| BA | Beerenauslese (German wine) |
| BA | Brutal Attack (band) |
| BA | Blocks Against (basketball scoring) |
| BA | Breathing Air |
| BA | Budget Activity |
| BA | Basic Access |
| BA | Behaviour Analysis (psychiatry/psychology) |
| BA | Blood Agar |
| BA | Barrel Aged (beer) |
| BA | Basic Agreement |
| BA | Bass Amplifier |
| BA | Bowling Association |
| BA | Benefits Administrator |
| BA | Boeing Aerospace |
| BA | Brewers Association (Boulder, Colorado) |
| BA | Battle Area |
| BA | Biblical Archaeologist |
| BA | Bankers' Acceptance (finance) |
| BA | Brandy Alexander (cocktail) |
| BA | Bonne Action (French: good deed) |
| BA | Basic Allowance |
| BA | Battlespace Awareness |
| BA | Basic Assembly |
| BA | Bearing Area |
| BA | Buffer Amplifier |
| BA | Bare-Assed |
| BA | Buoyancy Aid |
| BA | Budget Authorization |
| BA | Bill Acceptor |
| BA | Bank Asia (Bangladesh) |
| BA | Baccalaureus Artium (Bachelor of Arts degree) |
| BA | Braking Action |
| BA | Bank Angle |
| BA | British Africa |
| BA | Bangladesh Army |
| BA | Building Approval |
| BA | Black Ajah (Wheel of Time series) |
| BA | Battlefield Awareness |
| BA | Bus Arbiter |
| BA | Boston Acoustics, Inc. (speaker maker) |
| BA | Battlefield Area |
| BA | Botrytis Affected (wine; Botrytis Cinerea, aka Noble Rot) |
| BA | Burglary Alarm (alarm industry) |
| BA | Byte-Addressable |
| BA | Bible Advocate |
| BA | Behaviour Aggregate |
| BA | Bridge Architecture |
| BA | B'nei Akiva |
| BA | Binary Add |
| BA | Billing Adjustment |
| BA | Broward Alliance (Florida, USA) |
| BA | Bar Arcade (IRC network) |
| BA | British American Oil Company (pre Gulf Oil) |
| BA | Bergen Academies (Hackensack, New Jersey) |
| BA | Bridge Administration |
| BA | Ballistic Aggregation |
| BA | Build & Acquire (system development) |
| BA | Battle Assembly |
| BA | Bison Ambassadors |
| BA | Battery Adjust |
| BA | Battery Activate |
| BA | Business Area/Application |
| BA | Battle Allocation (Carnage Blender gaming) |
| BA | Battle Allocation (gaming) |
| BA | Branch Assistant, National Staff |
| BA | Bridging Alternative |
| BA | Bobtopian Army (gaming clan) |
| BA | Bridle Arrester |
| BA | Bachelieres Arts (degree) |