Noun: aa aa
- A dry form of lava with a rough, jagged surface
"The hikers struggled to cross the sharp aa lava field"
- An international organization that provides a support group for persons trying to overcome alcoholism
- Alcoholics Anonymous
- An associate degree in arts
- Associate in Arts
- Automobile Association
Derived forms: aas, AAs
Type of: associate, associate degree, lava, NGO, nongovernmental organisation [Brit], nongovernmental organization
Encyclopedia: Aa, Norway
AA