| Acronym | Definition |
|---|
| MPAI➣Most People Are Idiots |
| MPAI➣Mayo-Portland Adaptability Inventory (head trauma rehabilitation) |
| MPAI➣Music Publishers Association of Ireland (Dublin, Ireland) |
| MPAI➣Maximum Permissible Annual Intake |
| MPAI➣Marshall Plan Advisors, Inc. (Shaker Heights, OH) |