1. basaltic lava having a rough surface.

  1. administrative assistant.
  2. Alcoholics Anonymous.
  3. antiaircraft.
  4. author’s alteration.


  1. a proportional shoe width size, narrower than A and wider than AAA.
  2. the smallest proportional brassiere cup size.
  3. a quality rating for a corporate or municipal bond, lower than AAA and higher than A.
  4. Electricity. a battery size for 1.5 volt dry cells: diameter, 0.6 inches (1.4 cm); length, 2 inches (5 cm).
  5. British. a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult.Compare A(def 11), U(def 6), X(def 9).


  1. (in prescriptions) ana2.

  1. author’s alteration.

  1. Alcoholics Anonymous.
  2. antiaircraft.
  3. antiaircraft artillery.
  4. Associate in Accounting.
  5. Associate of Arts.
  6. author’s alteration.


  1. a volcanic rock consisting of angular blocks of lava with a very rough surface

abbreviation for

  1. ana 1

abbreviation for

  1. Alcoholics Anonymous
  2. anti-aircraft
  3. Architectural Association
  4. (in Britain) Automobile Association
  5. (in Britain) Advertising Association

symbol for

  1. (in Britain, formerly) a film that may not be shown publicly to a child under fourteen

also AA, abbreviation of Alcoholics Anonymous, attested by 1941, American English. The group name was the title of a book published in 1938 by the founder, Bill W.


  1. Alcoholics Anonymous
  2. amino acid
  3. aminoacyl

  1. A type of lava having a rough, jagged surface. It is relatively slow moving in its molten state, advancing in the form of massive blocks with fissured and angular surfaces that ride on a viscous interior. The blocks range in size between the size of a football and the size of a house. See Note at pahoehoe.
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