| Acronym | Definition |
|---|
| NK➣No Kidding |
| NK➣Natural Killer (immunology) |
| NK➣neck |
| NK➣North Korea |
| NK➣Not Known |
| NK➣Nogometni Klub (Croatian: Football Club) |
| NK➣Ninja Kiwi (game developer; New Zealand) |
| NK➣Nippon Kaiji Kyokai (ship classification society) |
| NK➣Spirit Airlines |
| NK➣North Kitsap |
| NK➣Neurokinin |
| NK➣Nordiska Kompaniet (Swedish department store) |
| NK➣No Keyword |
| NK➣Noritsu Koki (Japan) |
| NK➣New York to Key West (routing designation; US Navy) |
| NK➣Neuroenergetic Kinesiology |
| NK➣Nippon Kasei (Nippon Kasei Chemical Co., Ltd. Japan) |
| NK➣Naked Killer (Diablo 2/LoD game) |
| NK➣Nice Kill (gaming) |
| NK➣North Kanara (Indian district) |
| NK➣Naya Kadam (Suriname) |
| NK➣North Karana (Everquest) |
| NK➣Nuclear Kill (warhead) |
| NK➣Northern Plains of Karana (Everquest) |
| NK➣Newton-Kantorovich Method |
| NK➣Nice Kicker (online poker) |
| NK➣Nanokiero Media (Internet company) |