| Abbreviation | Definition |
|---|---|
| MEAC | Mid Eastern Athletic Conference |
| MEAC | Mid-Eastern Athletic Conference |
| MHAA | Mendota Heights Athletic Association |
| MHAA | Minot Hebron Athletic Association |
| MHAA | Mint Hill Athletic Association |
| MHAA | Monfort Heights Athletic Association |
| MHAC | Morgan Hill Athletic Club |
| MHAC | Mt Hood Athletic Club |
| MHSAA | Michigan High School Athletic Association |
| MHSAA | Mississippi High School Athletic Association |
| MIAA | Maryland Interscholastic Athletic Association |
| MIAA | Massachusetts Interscholastic Athletic Association |
| MIAA | Memphis Interscholastic Athletic Association |
| MIAA | Michigan Intercollegiate Athletic Association |
| MIAA | Michigan Intercollegiate Athletics Association |
| MIAA | Mid-America Intercollegiate Athletics Association |
| MIAC | Minnesota Intercollegiate Athletic Conference |
| MILE | Minutes I Logged Exercising |
| MKAC | Milton Keynes Athletic Club |
| MMAC | Madison Meadow Athletic Center |