| Acronym | Definition |
|---|
| NSAI➣Nashville Songwriters Association International |
| NSAI➣National Standards Authority of Ireland |
| NSAI➣Netherland, Sewell and Associates, Inc. (petroleum consultants; Texas) |
| NSAI➣National Spatial Address Infrastructure (UK Improvement and Development Agency) |
| NSAI➣Non-Steroidal Anti-Inflamatory |
| NSAI➣Neuroscience and Aging Institute (Loyola University; Chicago, IL) |