| Acronym | Definition |
|---|
| OAD | Open Access Directory |
| OAD | Once-A-Day (milking) |
| OAD | Office for Addictive Disorders (Louisiana) |
| OAD | Over Air Download (firmware update method) |
| OAD | Oral Anti-Diabetic |
| OAD | Obstructive Airway Disease |
| OAD | Overall Diameter (ophthalmic) |
| OAD | Original Air Date |
| OAD | Ontario Association of the Deaf (Canada) |
| OAD | Original Animation DVD |
| OAD | Object Activation Daemon |
| OAD | Obscure Auditory Dysfunction |
| OAD | Ohio Association of the Deaf |
| OAD | Oklahoma Association of the Deaf |
| OAD | Option Adjusted Duration |
| OAD | Overseas Arrivals and Departures |
| OAD | Ordered to Active Duty |
| OAD | Overactive Adrenaline Disorder (Ford Motors marketing campaign) |
| OAD | Oregon Association of the Deaf, Inc. |
| OAD | Over-Action Dolphin (dance move) |
| OAD | Operational Availability Date |
| OAD | One and Done |
| OAD | Orlando Anime Day (Florida) |
| OAD | Operational Aviation Detachment |
| OAD | Oss Alarm Dispatcher (Alcatel-Lucent; Paris, France) |
| OAD | Occipitoatlantal Dislocation (medical) |
| OAD | Ordinary Arbitration Division (ICAS) |
| OAD | Ordered Algebraic Decoding |
| OAD | Occupation Analysis Document |
| OAD | Off-Axis Directivity |
| OAD | Other Adverse Disposition (criminal cases) |
| OAD | Operationally Available Data |
| OAD | Special Audits Division (DCAA) |
| OAD | Office of Atomic Development |
| OAD | Open Abdominal Drainage |
| OAD | Operational Availability Demonstration |
| OAD | Organisation d'Aide au Developpement (French: Organization to Aid Development) |
| OAD | Opinionated about Dining |