| Acronym | Definition |
|---|
| NNF➣Negation Normal Form |
| NNF➣Never Not Funny (podcast) |
| NNF➣No New Friends |
| NNF➣Not Not Fun (record label; Los Angeles, CA) |
| NNF➣Namibia Nature Foundation |
| NNF➣Negation Normal Form (logic) |
| NNF➣Name Not Final (gaming; World of Warcraft) |
| NNF➣National Nanofabrication Facility (Cornell University) |
| NNF➣National Nothing Foundation |
| NNF➣No Name Face (album title) |
| NNF➣Norsk Nettverksforum |
| NNF➣Nearest Neighbor Filter |
| NNF➣Normally No Flow (piping) |
| NNF➣Narrowband Nebular Filter |
| NNF➣Nonreactor Nuclear Facility |
| NNF➣No Fault Found (electronic device testing) |
| NNF➣No Name Found (band) |