| Abbreviation | Definition |
|---|---|
| MDRI | Medical Device Research Institute |
| MEERI | Medical Education and Educational Research Institute |
| MEI | Maryland English Institute |
| MEI | Middle East Institute |
| MEI | Multicultural Entrepreneurial Institute |
| MEMI | Mumbai Event Management Institute |
| MERI | Marine Engineering and Research Institute |
| MERIN | Medical Education Research Institute of Nevada |
| MERSI | Massachusetts Eye Research and Surgery Institution |
| MESI | Minnesota Evaluation Studies Institute |
| MESPI | Middle East Studies Pedagogy Initiative |
| METI | Modern Education and Training Institute |
| MFAI | Michael Fields Agricultural Institute |
| MFCI | Manchester Federal Correctional Institution |
| MFI | Massachusetts Family Institute |
| MFI | Monetary Financial Institutions |
| MGCI | Marc Garneau Collegiate Institute |
| MGCI | Museums Galleries and Collections Institute |
| MGHI | Merck Global Health Institute |
| MGI | McKinsey Global Institute |