| Acronym | Definition |
|---|
| TNR | Trap-Neuter-Return (controlling feral cats) |
| TNR | The New Republic |
| TNR | Times New Roman (font) |
| TNR | Transportation and Natural Resources (Texas) |
| TNR | The Natural Resource |
| TNR | The Next Revolution |
| TNR | True Negative Rate (statistics) |
| TNR | Antananarivo, Madagascar - Ivato (Airport Code) |
| TNR | Tonic Neck Reflex |
| TNR | The Ninja's Return (gaming) |
| TNR | The Ninja-RPG (online game) |
| TNR | Terabit Network Router (Pluris) |
| TNR | Transmit Not Ready |
| TNR | Titulaire Non Résident (French: Non-Resident Holder) |
| TNR | Thermonuclear Reaction |
| TNR | Time-Not-Ready |
| TNR | Thermal Neutron Radiography |
| TNR | Temperature of No Return |
| TNR | Threshold-to-Noise Ratio |
| TNR | Transmitted Noise Reduction |
| TNR | Terminal Network Replacement |
| TNR | Trinuclear Repeat |