AA

¹ American  

abbreviation

1. administrative assistant.

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A.A. ² American  

[ey-ey] / ˈeɪˈeɪ /

Or AA

abbreviation

1. Alcoholics Anonymous.

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AA ³ American  

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. Electricity.  a battery size for 1.5-volt dry cells: diameter, 0.6 inch (1.4 centimeters); length, 2 inches (5 centimeters).

5. British.  a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult.

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A.A. ⁴ American  

abbreviation

1. antiaircraft. Also AA

2. Associate in Accounting.

3. Associate of Arts.

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aa ⁵ American  

[ah-ah] / ˈɑ ɑ /

Or a'a,

noun

1. basaltic lava having a rough surface.

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a̅a̅ ⁶ American  

Or āa

Symbol.

1. (in prescriptions) ana.

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a.a. ⁷ American  

Or aa

abbreviation

1. author's alteration. Also A.A., AA

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aa ¹ British  

/ ˈɑːɑː /

noun

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

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aa ² British  

abbreviation

1. ana ¹

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AA ³ British  

abbreviation

1. Alcoholics Anonymous

2. anti-aircraft

3. Architectural Association

4. (in Britain) Automobile Association

5. (in Britain) Advertising Association

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symbol

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

aa Scientific  

/ ä′ä /

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.

2. See Note at pahoehoe

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Etymology

Origin of aa¹

First recorded in 1855–60; from Hawaiian ʿaʿā

Origin of a̅a̅¹

From the Greek word aná, with superscript bar representing the nasal consonant

Example Sentences

Wells also lists the men who died young in their line of work: A.A.

From Salon

Sharon — the hairdresser, played by Hilary Swank — learns of Schmitt’s plight and decides to help the family as a focus for her energies after reluctantly attending an A.A. meeting.

From New York Times

"The notions of an intermediate state and its decisive role in crystal growth refute and replace the dominant idea in the field, brought up by A.A. Chernov, my PhD advisor, that the activation barrier for growth is determined by the solute-solvent interactions in the solution bulk," he said.

From Science Daily

In 1971, he formed a law partnership with Peter A.A.

From New York Times

Though there are other characters — an A.A. sponsor; Kirsten’s stern father — Guettel chose to have only Kirsten, Joe and, occasionally, their daughter, sing.

From New York Times