| Acronym | Definition |
|---|
| MUA | Mail User Agent (Internet email) |
| MUA | Marvel Ultimate Alliance |
| MUA | Municipal Utilities Authority |
| MUA | Maritime Union of Australia |
| MUA | Military Utility Assessment |
| MUA | Medical University of the Americas (various locations) |
| MUA | Medically Underserved Area (US HRSA) |
| MUA | Mail User Agent |
| MUA | Mujeres Unidas y Activas |
| MUA | Make Up Artist (fashion and beauty) |
| MUA | Museum of Underwater Archaeology |
| MUA | Major Urban Area (various locations) |
| MUA | Meritorious Unit Award (US DoD) |
| MUA | Makeup Air (HVAC industry) |
| MUA | Ministry of University Affairs (of Thailand) |
| MUA | Municipal Utilities Association (Texas) |
| MUA | Manipulation Under Anaesthesia (physical therapy) |
| MUA | Multi-Unit Activity |
| MUA | Mediterranea Umbro Aretina (Italian railway) |
| MUA | Memorandum of Understanding and Agreement |
| MUA | Measurement Uncertainty Analysis |
| MUA | Makeup Alley (website) |
| MUA | Miniature Unmanned Aircraft (US DoD) |
| MUA | Malaysian Urological Association |
| MUA | Materials Usage Agreement |
| MUA | Multiattribute Utility Analysis |
| MUA | Maximum Usable Altitude |
| MUA | Malicious User Activity |
| MUA | Management User Agent |
| MUA | Maintenance Group Unblocking (CCS #7 ITU-T) |
| MUA | Made Up Acronym |
| MUA | Motorized Unit of Action |