The Collaborative International Dictionary of English v.0.48:
OAS \OAS\ n.
The Organization of American States an international
association of countries in the Western hemisphere. It was
created in 1948 to promote military and economic and social
and cultural cooperation. [acronym]
Syn: Organization of American States.
WordNet (r) 3.0 (2006):
n 1: an association including most countries in the western
hemisphere; created in 1948 to promote military and
economic and social and cultural cooperation [syn:
Organization of American States, OAS]
V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
Office Automation System