| Acronym | Definition |
|---|
| NIK➣Nederlands-Israëlitisch Kerkgenootschap |
| NIK➣NF-Kappa-B-Inducing Kinase |
| NIK➣Najwyzsza Izba Kontroli (Poland: Highest Controlling House) |
| NIK➣Not-In-Kind (CFC technology) |
| NIK➣Narcotics Identification Kit |
| NIK➣Network Integration Kit (US DoD) |
| NIK➣Neumann Informatikai Kar (Hungary) |
| NIK➣Normal Input Keying |