| Abbreviation | Definition |
|---|---|
| NCZ | No Country Zone |
| ND | Non Deployed |
| ND | Non Detectable |
| ND | Normal Deployment (Posture) |
| ND | Not Detected |
| ND | Not Determined |
| ND | Not Detonate |
| ND | Nuclear Disarmament |
| NDA | National Defence Academy |
| NDA | National Defense Area |
| NDA | No Detectable Activity |
| NDAA | National Defense Authorization Act |
| NDAF | Navy, Defense Logistics Agency, Air Force |
| N-Day | Day An Active Duty Unit is Notified For Deployment or Redeployment |
| N-DAY | Notification Day |
| N-DAY | Notification Day; Day that the unit is Notified for Deployment/ Employment |
| NDB | Navigation Data Base |
| NDC | NATO Defense College |
| NDCS | National Drug Control Strategy |
| NDDOC | US Northern Command Deployment and Distribution Operations Center |