A.A.

¹

abbreviation

1. antiaircraft. Also AA

2. Associate in Accounting.

3. Associate of Arts.

A.A.

²

Or AA

[ey-ey]

abbreviation

1. Alcoholics Anonymous.

a.a.

³

Or aa

abbreviation

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

AA

⁴

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.

a̅a̅

⁵

Or āa

Symbol.

1. (in prescriptions) ana.

AA

⁶

abbreviation

1. administrative assistant.

aa

⁷

Or a·'a,

[ah-ah]

noun

1. basaltic lava having a rough surface.

aa

¹

abbreviation

1. ana ¹

AA

²

abbreviation

1. Alcoholics Anonymous

2. anti-aircraft

3. Architectural Association

4. (in Britain) Automobile Association

5. (in Britain) Advertising Association

symbol

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

aa

³

/ ˈɑːɑː /

noun

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

aa

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

Word History and Origins

Origin of aa¹

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

Origin of aa²

First recorded in 1855–60; from Hawaiian ʿaʿā

Word History and Origins

Origin of aa¹

Hawaiian