aa
- n a dry form of lava resembling clinkers
- n an international organization that provides a support group for persons trying to overcome alcoholism
- n an associate degree in arts
aaa
- n an aneurysm of the abdominal aorta associated with old age and hypertension
aachen
- n a city in western Germany near the Dutch and Belgian borders; formerly it was Charlemagne's northern capital
aaland islands
- n an archipelago of some 6,000 islands in the Gulf of Bothnia under Finnish control