| Acronym | Definition |
|---|
| NWI | Northwest Indiana |
| NWI | National Wetlands Inventory |
| NWI | National Water Initiative (Australia) |
| NWI | Network Interface |
| NWI | New Work Item |
| NWI | National Wraparound Initiative (Seattle, WA) |
| NWI | Newsworld International (former channel 366 on DirecTV) |
| NWI | National Workrights Institute |
| NWI | Native Wellness Institute |
| NWI | Norwich, England, United Kingdom - Norwich (Airport Code) |
| NWI | New World International (registered charity; UK) |
| NWI | Netherlands West Indies |
| NWI | National Women's Institute |
| NWI | Navy Wide Internet |
| NWI | Non-Working Interference (dentistry) |
| NWI | New World Infrastructure Company Limited (China) |