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Abbreviation: ACAS
  1. Airborne Collision Avoidance System
     
  2. [Brit] Advisory, Conciliation and Arbitration Service
Noun: ACA
Usage: US
  1. A US healthcare reform law enacted in 2010 to expand insurance coverage and reduce costs
    "ACA provided health insurance to millions of uninsured Americans";
    - Obamacare [US, informal], Affordable Care Act [US]

Encyclopedia: ACAS

ACA