| Acronym | Definition |
|---|
| NRB | Natural Resources Board |
| NRB | National Religious Broadcasters |
| NRB | Nepal Rastra Bank |
| NRB | Nil Rate Band (inheritance tax; UK) |
| NRB | Next Reference Block |
| NRB | Nero Cdrom Boot |
| NRB | Non-Resident Bangladeshi |
| NRB | National Reconstruction Bureau (Pakistan) |
| NRB | National Review Board |
| NRB | National Research Bureau |
| NRB | Needle Roller Bearing |
| NRB | Nuclear Receptor-Binding (endocrinology) |
| NRB | Nile River Basin |
| NRB | Non-Regulated Business |
| NRB | Not Required Back |
| NRB | National Reservation Bureau Inc |
| NRB | No Reason Boner |
| NRB | Navy Reservation Bureau (US Navy) |
| NRB | Naval Repair Base (US Navy) |
| NRB | Need Response By |
| NRB | Non Re-Breather (mask used in anesthesia) |
| NRB | Non-Conformance Review Board |
| NRB | Non-Returnable Bottle |
| NRB | Neutral Red Bioassay |
| NRB | Nightmare River Band (music group) |
| NRB | Nootka Resource Board (Gold River, BC, Canada) |
| NRB | National Repair Bureau (Sprint application) |
| NRB | Neighbourhood Renewal Board (UK) |
| NRB | Network Relationship Banking |
| NRB | Nonrejoining Break (DNA strand) |
| NRB | Naval Rolled Brass (tubesheet material used in shell-and-tube condensers and heat exchangers) |