MNEI
| Acronym | Definition |
|---|---|
| MNEI | Maison de la Nature et de l'Environnement de l'Isère (French: House of Nature and the Environment of the Isère; environmental awareness association; Isère, France) |
| MNEI | Monocyte/Neutrophil Elastase Inhibitor |
| MNEI | Millennium National Events, Inc. (Nevada) |