AAU
AAU is a three-letter abbreviation with multiple meanings, as described below:
- Acute anterior uveitis, an inflammatory joint disease; see Spondyloarthropathy
- Addis Ababa University, a university in Ethiopia
- Amateur Athletic Union, a sports organization in the United States
- Antillean Adventist University, a Christian university in Mayagüez, Puerto Rico
- Asau Airport (IATA airport code: AAU) in Asau, Samoa
- Asian Americans United, a charitable organization registered in Pennsylvania
- Assam Agricultural University
- Association of African Universities
- Association of American Universities
- University of Aalborg, located in Denmark