NNR
| Acronym | Definition |
|---|---|
| NNR | National Nature Reserve (United Kingdom) |
| NNR | Nishi-Nippon Railroad (Japan) |
| NNR | Nearest Neighbor Rule (algorithm) |
| NNR | National Nuclear Regulator (South Africa) |
| NNR | Never Not Riding (cycling club) |
| NNR | North Norfolk Railway (UK) |
| NNR | Neuronal Nicotinic Receptor |
| NNR | National Narcolepsy Registry |
| NNR | Neb Neb Revolution (website) |
| NNR | No Need to Respond (Internet slang) |
| NNR | Naach Naach Revolution (dance competition) |
| NNR | Navy Nonreporting |
| NNR | Neural Network Review |