Plain English Meaning
A screen (or part of a screen) that tells the pilot which onboard systems are working properly and which are not.
Full Definition
On an electronic flight display, the System Status page or annunciation area shows the operational condition of the aircraft's avionics and related systems, including which sensors, radios, navigation sources, and equipment are functioning normally, degraded, or failed.
Context Anchor
Seen on instrument displays, GPS units, flight management systems, and system pages that show whether equipment is ready and reliable enough to use.
Derivation
System comes from a Greek word meaning a set of things placed together. comes from a Latin word meaning standing or condition. Together, the term points to the present condition of a connected set of equipment.