Plain English Meaning
An arrival route into a busy airport that is flown using the aircraft's own navigation system, following a chain of named points rather than tracking signals from ground stations.
Full Definition
Standard Terminal Arrival Routes designed using area navigation, allowing aircraft to fly from the en route environment to the destination airport along a published path defined by geographic waypoints rather than ground-based navigation aids. RNAV STARs are flown using onboard navigation systems (typically GPS or FMS) capable of meeting the required navigation performance specified for the procedure, and they often include published and to .