| Acronym | Definition |
|---|
| MRIA➣Marketing Research and Intelligence Association (also seen as ARIM; Canada) |
| MRIA➣Matter Requiring Immediate Attention |
| MRIA➣Member of the Royal Irish Academy (humanities/sciences; Ireland) |
| MRIA➣Model Railroad Industry Association |
| MRIA➣Marine Renewables Industry Association (Ireland) |
| MRIA➣Mentally Retarded Infantile Autism (developmental disorder) |