# AA

> English word · Noun · frequency rank #6,979

## Definitions
1. A member of Alcoholics Anonymous.
2. An AA battery (energy-storage device).
3. Initialism of affirmative action.
4. Initialism of air armament.
5. Initialism of air attaché.
6. Initialism of aircraft apprentice.
7. Initialism of aircraft artificer.
8. Initialism of absolute altitude.
9. Initialism of anti-aircraft.
10. Initialism of avenue of approach.
11. Initialism of assembly area.
12. Initialism of airman apprentice.
13. Initialism of absolute alcohol.
14. Initialism of achievement age.
15. Initialism of acting appointment.
16. Initialism of adoption agency.
17. Initialism of armament artificer.
18. Initialism of athletic association.
19. Initialism of author's alteration.
20. Initialism of aviation annex.
21. Initialism of angular aperture.
22. Initialism of amino acid.
23. Initialism of aminoacyl.
24. Initialism of acetic acid.
25. Initialism of acrylic acid.
26. Initialism of amyloid A.
27. Initialism of arachidonic acid.
28. Initialism of ascorbic acid.
29. Initialism of asymmetric aminohydroxylation.
30. Initialism of acetaldehyde adduct.
31. Initialism of adrenal androgen.
32. Initialism of antiandrogen.
33. Initialism of antioxidant activity.
34. Initialism of atomic absorption.
35. Initialism of activated alumina.
36. Initialism of anti-antibody.
37. Initialism of ascending aorta.
38. Initialism of abdominal aorta.
39. Initialism of aortic arch.
40. Initialism of acute appendicitis.
41. Initialism of allergic asthma.
42. Initialism of alopecia areata.
43. Initialism of anaplastic astrocytoma.
44. Initialism of anastomotic aneurysm.
45. Initialism of aortic aneurysm.
46. Initialism of aplastic anemia.
47. Initialism of arterial aneurysm.
48. Initialism of arytenoid adduction.
49. Initialism of anesthesiologist assistant.
50. Initialism of anesthesia assistant.
51. Initialism of antialiasing.
52. Initialism of African-American.
53. Initialism of Asian-African.
54. Initialism of Asian American.
55. Initialism of administrative assistant.
56. Initialism of associate administrator.
57. Initialism of assistant adjutant.
58. Initialism of academic adviser.
59. Initialism of Associate in Arts or Associate of Arts.
60. Initialism of appropriate authority.
61. Initialism of appropriate adult.
62. Initialism of account aggregator.
63. Initialism of appointed actuary.
64. Initialism of approximate absolute.
65. Initialism of arithmetic average.
66. Initialism of Association Agreement: a treaty between the European Union, its member states and a non-EU country that creates a framework for cooperation between them.
67. Initialism of against actual.
68. Initialism of approach anxiety.
69. Initialism of agent assistant; an assistant of a real estate agent.
70. Initialism of annual allowance.
71. Abbreviation of all-around.
72. Initialism of average audience.

## Etymology
Abbreviations.

## Easily confused with
- **as** (https://plainspell.com/en/vs/aa-vs-as)
- **at** (https://plainspell.com/en/vs/aa-vs-at)
- **an** (https://plainspell.com/en/vs/aa-vs-an)
- **AM** (https://plainspell.com/en/vs/aa-vs-am)
- **AL** (https://plainspell.com/en/vs/aa-vs-al)
- **AD** (https://plainspell.com/en/vs/aa-vs-ad)
- **ah** (https://plainspell.com/en/vs/aa-vs-ah)
- **AP** (https://plainspell.com/en/vs/aa-vs-ap)
- **AC** (https://plainspell.com/en/vs/aa-vs-ac)
- **ai** (https://plainspell.com/en/vs/aa-vs-ai)
- **aw** (https://plainspell.com/en/vs/aa-vs-aw)
- **AR** (https://plainspell.com/en/vs/aa-vs-ar)
- **AU** (https://plainspell.com/en/vs/aa-vs-au)
- **AF** (https://plainspell.com/en/vs/aa-vs-af)
- **ag** (https://plainspell.com/en/vs/aa-vs-ag)
- **AK** (https://plainspell.com/en/vs/aa-vs-ak)
- **AZ** (https://plainspell.com/en/vs/aa-vs-az)
- **av** (https://plainspell.com/en/vs/aa-vs-av)
- **ay** (https://plainspell.com/en/vs/aa-vs-ay)
- **AE** (https://plainspell.com/en/vs/aa-vs-ae)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/aa