| Acronym | Definition |
|---|
| OTT | Ottawa (Ontario, Canada) |
| OTT | Office of Technology Transfer |
| OTT | Over The Top |
| OTT | Open Office Text Template |
| OTT | Object Type Translator (computing) |
| OTT | Office of Transportation Technologies (US DOE) |
| OTT | Overseas-Trained Teacher (UK) |
| OTT | Off the Truck |
| OTT | Office of Technology Transition (ODUSDS&T) |
| OTT | Oikeustieteen Tohtori (Finnish: Doctor of Laws; law degree) |
| OTT | One Tool Torque (trademark of Master Lock Company, LLC) |
| OTT | Office of Training Technology (Chief of Naval Operations) |
| OTT | Our Toxic Times (newsletter of the Chemical Injury Information Network) |
| OTT | Office of Travel and Tourism |
| OTT | Optical Technology Training Ltd (UK) |
| OTT | Obelisk the Tormentor (Yu-Gi-Oh! card) |
| OTT | Operator Tactics Trainer |
| OTT | One-Time Tape |
| OTT | Ontario Traffic Tickets (OTT Legal Services, Inc.; Canada) |
| OTT | Operating Theatre Technician (UK) |
| OTT | Off Their Trolley |
| OTT | Ocean Tactical Targeting |
| OTT | Office of Technological Terminology (Technion, Israel) |
| OTT | Output Threshold Test |
| OTT | Office of Outreach and Technology Transfer (North Carolina) |
| OTT | Origin Truck Terminal |
| OTT | Operational Training Test |