SMEI
| 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 |