| Acronym | Definition |
|---|
| NNB➣New Northwest Broadcasters (est. 1998; Seattle, WA) |
| NNB➣New Nuclear Build Generation Company (UK) |
| NNB➣Northern Native Broadcasting (Canada) |
| NNB➣Number Nine Bus |
| NNB➣Negative Nitrogen Balance |
| NNB➣National Neopian Bank (Neopets) |
| NNB➣Numbers Needed to Benefit (vascular medicine) |
| NNB➣Non-Night-Blind Controls (nutrition) |