| Acronym | Definition |
|---|
| OTR➣Over The Road (truckers) |
| OTR➣On the Real |
| OTR➣Other |
| OTR➣Office of Tax and Revenue |
| OTR➣Old Time Radio |
| OTR➣On the Record |
| OTR➣Over the River |
| OTR➣Office of Trade Relations (US Customs and Border Protection) |
| OTR➣Over-The-Rhine (Cincinnati, Ohio neighborhood) |
| OTR➣Original Theatrical Release (movies) |
| OTR➣On The Road |
| OTR➣Off the Record |
| OTR➣Outer |
| OTR➣Off-The-Road (vehicles/tires) |
| OTR➣On the Run |
| OTR➣Optical Transponder (Nortel Networks Corporation) |
| OTR➣Online TV Recorder (software) |
| OTR➣Over The Rainbow |
| OTR➣Occupational Therapist, Registered |
| OTR➣On the Rocks |
| OTR➣Output Routine |
| OTR➣Optical Transceiver |
| OTR➣One Touch Recording |
| OTR➣Operational Test Requirement |
| OTR➣Operational Trouble Report |
| OTR➣Ozone Transport Region (EPA) |
| OTR➣Oxygen Transmission Rate |
| OTR➣Optical Transition Radiation |
| OTR➣One Touch Recording (VCRs) |
| OTR➣Oxytocin Receptor |
| OTR➣Olympic Torch Relay |
| OTR➣Over-The-Range (microwave oven) |
| OTR➣Off the Rack |
| OTR➣Operating Temperature Range |
| OTR➣Order-To-Remittance |
| OTR➣On The Rag |
| OTR➣Old Timers Reunion |
| OTR➣Official Transcript of Records |
| OTR➣Oakland Terminal Railway |
| OTR➣Obecná Teorie Relativity (Czech: general theory of relativity) |
| OTR➣Overhead Transfer Rate |
| OTR➣Optical Tracking |
| OTR➣Oceanic Transition Route |
| OTR➣Off-The-Rail |
| OTR➣Other Than Rock |
| OTR➣Operational Turn Round |
| OTR➣Order to Receipt |
| OTR➣Originale Trasmissione del Ritmo (band) |
| OTR➣Opportunity To Recall |
| OTR➣Operational Test Readiness |
| OTR➣Operability Test Report |
| OTR➣Outyear Threat Report |
| OTR➣Out-Of-Tolerance Report |
| OTR➣Officer Technical Refresh |
| OTR➣Coto 47 Airstrip, Costa Rica (Airport code) |
| OTR➣Overall Tuning Range |
| OTR➣One Time Requisition |
| OTR➣Organization of the Top Rappers |
| OTR➣Order to Requisition |