| Acronym | Definition |
|---|
| NNO➣Nevládní Neziskové Organizace (Czech: Non-Governmental Organization) |
| NNO➣National Night Out (community crime prevention program) |
| NNO➣Nordnordost (German; North-North-East) |
| NNO➣Nord-Nord-Ovest (Italian: North-North-West) |
| NNO➣Nanophthalmos |
| NNO➣New Neighbor Orientation |
| NNO➣Nintendo News Online (website) |