| Acronym | Definition |
|---|
| FNR | Forestry and Natural Resources (various universities) |
| FNR | Fonds National de la Recherche (French: National Fund for Research; Luxembourg) |
| FNR | Fachagentur Nachwachsende Rohstoffe (German: Agency for Renewable Resources) |
| FNR | Frais de Notaire Reduits (French; Reduced Notary Cost) |
| FNR | Fast Neutron Reactor |
| FNR | Funk Night Records (record label) |
| FNR | File Name Record |
| FNR | Ferredoxin NADP+ Reductase |
| FNR | False Negative Rate |
| FNR | For No Reason |
| FNR | Find and Replace |
| FNR | Ford Nuclear Reactor |
| FNR | Fermetures Neuf et Rénovation (French renovation company) |
| FNR | Future Net Revenue |
| FNR | Friday Night Ride |
| FNR | Full Needle Rib (knitting) |
| FNR | Flexible Numbering Register |
| FNR | Fixed Network Reconfiguration |
| FNR | Final Notice of Recommendation (education) |
| FNR | Frequency Normalization Response (RF tuner gain calibration technique) |
| FNR | Fumarate Nitrate Reductase Regulation |