| Acronym | Definition |
|---|
| SMEI➣Sales & Marketing Executives, International (New York nonprofit) |
| SMEI➣Severe Myoclonic Epilepsy of Infancy |
| SMEI➣Solar Mass Ejection Imager (joint research project) |
| SMEI➣Sony Music Entertainment Inc. |
| SMEI➣Systems Management Engineering, Inc. (est. 1997; Reston, VA) |
| SMEI➣Simplicity Matters Earth Institute (Keedysville, MD) |
| SMEI➣Small/Medium Enterprise Initiative |