| Acronym | Definition |
|---|
| MMDI➣Metropolitan Model Deployment Initiative |
| MMDI➣Minnesota Medical Development, Inc. |
| MMDI➣MacLaren McCann Direct and Interactive (marketing; Canada) |
| MMDI➣Mental Muscle Diagram Indicator (personality test) |
| MMDI➣Millennium Mold Design, Inc. (Ringwood, IL) |