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aa

[ah-ah] /ˈɑ ɑ/
noun
1.
basaltic lava having a rough surface.
Also, a'a.
Compare pahoehoe.
Origin
1855-1860
1855-60; < Hawaiian ʿaʿā

AA

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 inches (1.4 cm); length, 2 inches (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).

a̅a̅

Symbol.
1.
(in prescriptions) ana2 .
Also, āa.
Origin
< Greek aná, with superscript bar representing the nasal consonant

A.A.

3.
antiaircraft artillery.
4.
Associate in Accounting.

a.a.

Also, aa.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for aa
  • They are funded by local members and responsible to the aa groups they represent.
  • aa promotes the idea that recovery from alcoholism entails more than not drinking.
British Dictionary definitions for aa

a'

/ɔː/
determiner
1.
(Scot) variants of all

aa1

/ˈɑːɑː/
noun
1.
a volcanic rock consisting of angular blocks of lava with a very rough surface
Word Origin
Hawaiian

aa2

abbreviation
1.
ana1

AA

abbreviation
1.
Alcoholics Anonymous
2.
anti-aircraft
3.
Architectural Association
4.
(in Britain) Automobile Association
5.
(in Britain) Advertising Association
symbol
6.
(in Britain, formerly) a film that may not be shown publicly to a child under fourteen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for aa

A.A.

also AA, abbreviation of Alcoholics Anonymous, attested by 1941, American English. The group name was the title of a book published in 1938 by the founder, Bill W.

Online Etymology Dictionary, © 2010 Douglas Harper
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aa in Medicine

AA abbr.

  1. Alcoholics Anonymous

  2. amino acid

  3. aminoacyl

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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aa in Science
aa
  (ä'ä)   
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. See Note at pahoehoe.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for aa

AA

modifier

: an AA barrage

noun

An antiaircraft weapon, or antiaircraft fire; ack-ack, flak (WWI)


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Related Abbreviations for aa

aa

  1. Afar (language)
  2. author's alteration

AA

  1. Academy of Aphasia
  2. Acts of the Apostles
  3. administrative assistant
  4. adverse action
  5. Alcoa Inc.
  6. Alcoholics Anonymous
  7. Alzheimer's Association
  8. antiaircraft
  9. Armed Forces Americas (except Canada)
  10. Associate in Arts
  11. atomic absorption
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Value for aa

2
2
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