A.B.A.
Proper noun
Meaning
Initialism of American Bar Association.
Initialism of American Bankers Association.
Initialism of American Basketball Association.
Source: en.wiktionary.orgExamples
In their letter, the Democratic senators did not contest that conclusion, but said they would support banning membership in the A.B.A. as well if the ethics panel deemed it necessary to rid the federal judiciary of perceived bias.