| Acronym | Definition |
|---|
| NKO➣Neptune Krill Oil (health supplement) |
| NKO➣Navy Knowledge Online (US Navy) |
| NKO➣North Kenwood Oakland (University of Chicago Charter School campus; Chicago, IL) |
| NKO➣Nederlandse Katholieke Oudervereniging (Dutch: Dutch Catholic Parents; Netherlands) |
| NKO➣Nederlandse Kalibratie Organisatie (Dutch: Dutch Calibration Organization; Netherlands) |
| NKO➣New Keith Order (gaming clan) |