| Acronym | Definition |
|---|
| NBA | National Basketball Association |
| NBA | National Book Award |
| NBA | National Bar Association |
| NBA | National Bank of Azerbaijan |
| NBA | National Braille Association |
| NBA | Narmada Bachao Andolan (India) |
| NBA | National Boxing Association |
| NBA | National Board of Antiquities (Finland) |
| NBA | Next-Best-Action (marketing) |
| NBA | Nashville Bar Association (Nashville, TN) |
| NBA | N-Butyl Alcohol (chemistry) |
| NBA | Number Bank Account |
| NBA | Non Blocking Architecture |
| NBA | Nissan Brake Assist |
| NBA | Non Blocking Assignment |
| NBA | Network Behaviour Analysis |
| NBA | National Business Association |
| NBA | Network Behavior Analysis |
| NBA | No Boys Allowed |
| NBA | National Band Association |
| NBA | National Bison Association |
| NBA | Nippon Bartenders Association (Japan) |
| NBA | North Bay Aqueduct (California) |
| NBA | Net Book Agreement |
| NBA | Next Best Alternative (finance) |
| NBA | National Benevolent Association |
| NBA | NanoBusiness Alliance |
| NBA | National Beekeepers Association (New Zealand) |
| NBA | Neighborhood Business Association |
| NBA | National Board of Advisors |
| NBA | National Business Agent |
| NBA | Nevada Broadcasters Association |
| NBA | Newmarket Business Association (Boston, Massachusetts) |
| NBA | Nevada Brothel Association |
| NBA | National Beef Ambassador (National Beef Association) |
| NBA | Nippon Billiards Association (Japan) |
| NBA | Nikko Bond Analysis (Japan) |
| NBA | National Benefit Administrators (Charlotte, NC) |
| NBA | Nevada Bar Association |
| NBA | National Bandmasters Association |
| NBA | National Brassfoundry Association (UK) |
| NBA | National Boating Association |
| NBA | Nebraska Beekeepers Association |
| NBA | National Blood Association |
| NBA | None-Blocking Architecture |
| NBA | Non-Parametric Boundary Analysis |
| NBA | Nepal Beekeepers Association |
| NBA | non-binding announcement |
