| Acronym | Definition |
|---|
| OTB➣On the Board |
| OTB➣Off-Track Betting |
| OTB➣Outside the Box (various companies) |
| OTB➣On the Bus (various companies) |
| OTB➣On the Bench |
| OTB➣Off the Boat |
| OTB➣On the Beach |
| OTB➣Outside the Beltway |
| OTB➣Option to Buy (real estate) |
| OTB➣Off to Bed |
| OTB➣Obey the Brave (Canadian band) |
| OTB➣One Touch Backup |
| OTB➣On the Bum |
| OTB➣Object Time Base |
| OTB➣Offer to Beat |
| OTB➣Out-of-the-Box |
| OTB➣Open-To-Buy |
| OTB➣On the Border (Mexican restaurant) |
| OTB➣Occupy the Banks (politics) |
| OTB➣Off The Back (used when a racer has been left behind) |
| OTB➣Ontario Trillium Benefit (Canada) |
| OTB➣Open to Below (construction) |
| OTB➣Over the Bridge |
| OTB➣Over the Beach |
| OTB➣Over-The-Board |
| OTB➣On-The-Ball |
| OTB➣Only the Best |
| OTB➣On The Brink (band) |
| OTB➣On-the-Books |
| OTB➣Object Test Bench |
| OTB➣Only the Bros |
| OTB➣OneSAF Testbed Baseline (RDT&E vehicle to develop OneSAF, US Army) |
| OTB➣Over the Bars (mountain bikes) |
| OTB➣Owning the Technical Baseline |
| OTB➣Online Turn Based (chess) |
| OTB➣Over Target Baseline (budgeting) |
| OTB➣Over the Boards (hockey website) |
| OTB➣Organisasi Tanpa Bentuk (Indonesian: formless organization) |
| OTB➣Operations Training Branch |
| OTB➣One Time Buy |
| OTB➣On Target Bonus |
| OTB➣Outside the Brick (Lego forums) |
| OTB➣Olympus Terumo Biomaterials Corporation (Japan) |
| OTB➣Object Transaction Broker |
| OTB➣Orbiter Timing Buffer |