| Acronym | Definition |
|---|
| NFI | National Fisheries Institute |
| NFI | National Fatherhood Initiative |
| NFI | National Forest Inventory (Australia) |
| NFI | National Fraud Initiative (UK) |
| NFI | New Flyer Industries (bus manufacturer) |
| NFI | New Freedom Initiative (US DOL) |
| NFI | National Fireplace Institute (certification agency; Arlington, VA; est. 2002) |
| NFI | Normed Fit Index (statistics) |
| NFI | Nasjonal Forskningsinformasjon (Norwegian Research Database) |
| NFI | Netherlands Forensic Institute |
| NFI | Non-Food Item(s) |
| NFI | Naz Foundation International (UK) |
| NFI | Net Farm Income |
| NFI | No Further Information (available) |
| NFI | Nutrition Foundation of India |
| NFI | New Frontiers International (Church network in Hove, UK) |
| NFI | Net Feed Intake (animal science) |
| NFI | Net Foreign Investment |
| NFI | No Financial Interest |
| NFI | Nouvelle Formation d'Ingénieur (French) |
| NFI | Narrow Fabrics Institute (Roseville, MN) |
| NFI | Not Further Identified |
| NFI | National Finance Institute (Australia) |
| NFI | no further interest |
| NFI | National Foreign Intelligence |
| NFI | Naval Facilities Institute |
| NFI | No Freaking Idea |
| NFI | Net Financial Indebtedness |
| NFI | Not for Inventory |
| NFI | No Flipping Idea (polite form) |
| NFI | Not Flipping Invited |
| NFI | Not for Issue (broken/reserved equipment) |
| NFI | Not Freakin' Interested (polite form) |
| NFI | National Federation of Ironmongers (UK) |
| NFI | Nielsen Food Index |
| NFI | Niagara's Finest Inns (Niagara-on-the-Lake, Ontario, Canada) |
| NFI | Not Formally Invited |