Noun aa has 3 senses
  1. aa - a dry form of lava resembling clinkers
    --1 is a kind of
    associate degree, associate; lava; associate degree, associate; lava
  2. Alcoholics Anonymous, AA - an international organization that provides a support group for persons trying to overcome alcoholism
    --2 is a kind of nongovernmental organization, NGO; nongovernmental organization, NGO
  3. Associate in Arts, AA - an associate degree in arts
    --3 is a kind of associate degree, associate; associate degree, associate
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