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Meaning of aa

a•a

Pronunciation: (ä'ä), [key]
— n.
  1. basaltic lava having a rough surface.

AA

Pronunciation: [key]
  1. See
  2. See
  3. antiaircraft.
  4. See

AA

Pronunciation: [key]
— Symbol.
  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. a battery size for 1.5 volt dry cells: diameter, 0.6 in. (1.4 cm); length, 2 in. (5 cm).
  5. a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult. Cf. A (def. 11),(def. 5),(def. 9).

aa

Pronunciation: [key]
— Symbol.
  1. (in prescriptions) ana.

A.A.

Pronunciation: [key]
  1. See
  2. antiaircraft.
  3. antiaircraft artillery.
  4. Associate in Accounting.
  5. See
  6. See

a.a.

Pronunciation: [key]
  1. See
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
  • aa (Thesaurus)