What is American Arbitration Association?

Legal Definition
The American Arbitration Association (AAA) is a not-for-profit organization in the field of alternative dispute resolution, providing services to individuals and organizations who wish to resolve conflicts out of court, and one of several arbitration organizations that administers arbitration proceedings. The AAA also administers mediation through Mediation.org and other forms of alternative dispute resolution. It is headquartered in New York City.

The International Centre for Dispute Resolution (ICDR), established in 1996 by the AAA, administers international arbitration proceedings initiated under the institution's rules. ICDR currently (as of 2007) has offices in New York City, Miami, Houston, Mexico City, and Singapore.
-- Wikipedia
Legal Definition
a voluntary and non-profit organisation that has a panel of arbitrators who hear labour and other sorts of disputes.