Definition of aa

 (Entry 1 of 3)

ana

AA

noun
\ ˈdə-bəl-ˈā How to pronounce AA (audio) \
plural AAs

Definition of AA (Entry 2 of 3)

Definition of AA (Entry 3 of 3)

1 administrative assistant
2 Alcoholics Anonymous
3 antiaircraft
4 arachidonic acid
5 associate in arts
6 author's alterations

First Known Use of aa

Noun

1937, in the meaning defined above

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Cite this Entry

“Aa.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aa. Accessed 4 Jun. 2020.

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More Definitions for aa

variants: also aa

Medical Definition of āā

 (Entry 1 of 2)

of each used at the end of a list of two or more substances in a prescription to indicate that equal quantities of each are to be taken

Medical Definition of AA (Entry 2 of 2)

2 Alcoholics Anonymous

History and Etymology for aa

Abbreviation

Latin ana

More from Merriam-Webster on aa

Britannica.com: Encyclopedia article about aa

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