WAAS is an acronym for the Wide Area Augmentation System, an air navigation aid to supplement GPS. WAAS, Waas, or WaaS may also refer to: Waas (surname) Wide area application services, technology developed by Cisco Systems Wilmington Academy of Arts and Sciences Windows as a Service, a business model for Windows 10 Workplace as a Service, a cloud-computing service World Academy of Art and Science, international organization