1. Initialism of Acoustical Society of America
2. Initialism of American Standards Association, which has changed its name to American National Standards Institute (ANSI).
3. Initialism of American Society of Anesthesiologists
4. Initialism of Amateur Swimming Association
5. (UK) Initialism of Advertising Standards Authority

ASA

1. (military) Initialism of air sovereignty alert: refers to fighter jet units that provide aerial defense of the nation via high-readiness aircraft.
2. (pharmacology, uncountable) Initialism of acetylsalicylic acid aspirin

1. A king of Judah mentioned in the Book of Kings.
   • 1611, The Holy Bible, […] (King James Version), imprinted at London: By Robert Barker, […], OCLC 964384981 ↗, 1 Kings 15:9-11 ↗:

     :

     And in the twentieth year of Jeroboam king of Israel reigned Asa over Judah. And forty and one years reigned he in Jerusalem. And his mother's name was Maachah, the daughter of Abishalom. And Asa did that which was right in the eyes of the LORD, as did David his father.

2. A male given name first used by Puritans.

• Portuguese: Asa