AA

Multiple Entries:
  AA    aa  

Concise Oxford English Dictionary © 2008 Oxford University Press:
AA/eɪˈeɪ/
abbreviation
  • 1 Alcoholics Anonymous.
  • 2 anti-aircraft.
  • 3 Automobile Association.

Concise Oxford English Dictionary © 2008 Oxford University Press:
aa /ˈɑːɑː/
noun Geology basaltic lava forming very rough, jagged masses with a light frothy texture. Often contrasted with pahoehoe.
– origin C19: from Hawaiian 'a-'a.
'AA' also found in these Oxford entries:

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