| Acronym | Definition |
|---|
| OPD | Outpatient Department |
| OPD | Oakland Police Department |
| OPD | Operand |
| OPD | Out Patient Department |
| OPD | Optical Path Difference |
| OPD | Office of the Public Defender |
| OPD | Opificio delle Pietre Dure (Florence, Italy) |
| OPD | Operations Division (US Department of War, WWII) |
| OPD | Orlando Police Department |
| OPD | Ocean Power Delivery (Edinburgh, Scotland) |
| OPD | Organizational Process Definition (Process Area; Capability Maturity Model Integration) |
| OPD | Overfill Protection Device (propane tanks) |
| OPD | Officer Professional Development |
| OPD | Offshore Product Development |
| OPD | Overfilling Prevention Device (propane tanks) |
| OPD | Office of Public Defense (Washington State) |
| OPD | Officially Pronounced Dead |
| OPD | Office of Policy Development (Department of Homeland Security) |
| OPD | Ontario Police Department |
| OPD | Orderly Payment of Debts |
| OPD | Ortho-Phenylenediamine (chemistry) |
| OPD | Olympia Police Department (Olympia, WA) |
| OPD | Organization Process Definition |
| OPD | Office of Program Development |
| OPD | OmniPage Document |
| OPD | Odessa Police Department (Odessa, Texas) |
| OPD | Oto-Palatal-Digital Syndrome (general bone/skeletal disorder) |
| OPD | Ocala Police Department |
| OPD | Owensboro Police Department (Owensboro, KY) |
| OPD | Opelousas Police Department (Louisiana) |
| OPD | One Per Deck |
| OPD | Ocoee Police Department |
| OPD | Overcurrent Protection Device |
| OPD | Orland Police Department |
| OPD | Original Promise Date |
| OPD | Output Performance Distribution |
| OPD | obsessive personality disorder |
| OPD | Ocean Profile Database |
| OPD | Audit Programs Division (DCAA) |
| OPD | Ovideo Police Department |
| OPD | Optical Proximity Detector |
| OPD | Over Past Due |
| OPD | Other Protestant Denominations |
| OPD | Old Persons Disease |
| OPD | Obsessive Potter Disorder (humor) |
| OPD | Orting Police Department (Orting, Washington) |
| OPD | Online Persian Dictionary (website) |