AA

¹

abbreviation for

1. administrative assistant.

A.A.

²

or AA

[ ey-ey ]

abbreviation for

1. Alcoholics Anonymous.

AA

³

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. Compare A ³( def 10 ), U ⁵( def 6 ), X ³( def 9 ).

A.A.

⁴

abbreviation for

1. antiaircraft. Also AA
2. Associate in Accounting.
3. Associate of Arts.

aa

⁵

or a·'a, 'a·'a

[ ah-ah ]

noun

1. basaltic lava having a rough surface.

a̅a̅

⁶

or āa

Symbol.

1. (in prescriptions) ana ².

a.a.

⁷

or aa

abbreviation for

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

AA

¹

abbreviation for

1. Alcoholics Anonymous
2. anti-aircraft
3. Architectural Association
4. (in Britain) Automobile Association
5. (in Britain) Advertising Association

symbol for

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

aa

²

abbreviation for

1. ana ¹

aa

³

/ ˈɑːɑː /

noun

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

aa

/ 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

Word History and Origins

Origin of AA¹

First recorded in 1855–60; from Hawaiian ʿaʿā

Origin of AA²

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

Word History and Origins

Origin of AA¹

Hawaiian

Example Sentences

And that’s quite fascinating about AA, in particular, that you don’t really know anything that they don’t want to tell you.

From Los Angeles Times

The AA warned motorists to check forecasts before setting out on the road and to drive with "extreme caution".

From BBC

As it made its way through the Ukrainian countryside there was still a yellow AA sticker on its windscreen, another white one on its back identified it as coming from the UK.

From BBC

The first stretch opened between Watford and Rugby, according to the AA, and this section took 19 months to construct including work through one of the wettest summers on record in 1958.

From BBC

He occasionally invited friends to enter the bubble, because “if you do have a little bit of an audience there’s a magic that happens,” he says, “like being in an AA meeting or something.”

From Los Angeles Times