| 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 in. (1.4 cm); length, 2 in. (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. 5), X (def. 9). |
| (in prescriptions) ana2. |

| 1. | Alcoholics Anonymous. |
| 2. | antiaircraft. |
| 3. | antiaircraft artillery. |
| 4. | Associate in Accounting. |
| 5. | Associate of Arts. |
| 6. | author's alteration. |
| AA abbr.
|
Acts of the Apostles (ākts) pl.n. (used with a sing. verb) Abbr. Ac or AA See Table at Bible. |
AA
AA abbr.
Alcoholics Anonymous
amino acid
aminoacyl
aa
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AA
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