| Acronym | Definition |
|---|
| NAK | Nursing (breastfeeding) At the Keyboard |
| NAK | Neuer Aachener Kunstverein (German art association) |
| NAK | Negative Acknowledgement |
| NAK | Negative Acknowledgment |
| NAK | Not Acknowledged |
| NAK | Nampula, Mozambique (Airport Code) |
| NAK | Nu Alpha Kappa (Latino fraternity) |
| NAK | No Acknowledgment |
| NAK | Nakhon Ratchasima, Thailand - Nakhon Ratchasima (Airport Code) |
| NAK | North American Kajukenbo (martial arts) |
| NAK | Not Acknowledged Signal (mobile radio communication system) |
| NAK | Naked At the Keyboard |
| NAK | Neuapostoliche Kirche (New Apostolic Church in Germany) |
| NAK | New Account Kit (retail banking) |