AA

1. See administrative assistant.

2. See Alcoholics Anonymous.

3. antiaircraft.

4. See author's alteration.

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. Elect. a battery size for 1.5 volt dry cells: diameter, 0.6 in. (1.4 cm); length, 2 in. (5 cm).

5. Brit. a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult. Cf. A (def. 11), U (def. 5), X (def. 9).

* * *