OSAS or Osas may refer to: Osas Ighodaro, a Nigerian actress Sleep Apnea - Obstructive Sleep Apnea Syndrome Eternal security - "Once Saved, Always Saved" (a common expression, with the relative acronym OSAS) a soteriological doctrine of the Protestant Christian faith. Overseas Scandinavian Airlines System, see History of Scandinavian Airlines System (pre-1952)