| Acronym | Definition |
|---|
| ARRA | American Recovery and Reinvestment Act of 2009 (transportation infrastructure funding) |
| ARRA | Asphalt Recycling and Reclaiming Association (Annapolis, MD) |
| ARRA | Americans for Responsible Recreational Access |
| ARRA | Arizona Radiation Regulatory Agency |
| ARRA | Announced Retransmission Random Access |
| ARRA | Australian Refugee Rights Alliance |
| ARRA | American Rosie the Riveter Association |
| ARRA | Adventurers of Renown: Ruins of Able-Wyvern |
| ARRA | Analysis of Reasoning, Rhetoric and Argumentation |
| ARRA | Association Régionale RadioAmateurs Inc. |