Plain English Meaning
A picture of where it's raining or storming, drawn on the cockpit map in colors that show how heavy the precipitation is. The image comes from a network of ground-based weather radars and is sent to the aircraft through a datalink.
Full Definition
A map-based display of weather radar information from the NEXRAD (Next Generation Radar) network, showing precipitation intensity and coverage as colored areas overlaid on a moving map in the cockpit, typically delivered via satellite or ADS-B datalink.
Context Anchor
Seen on a multi-function display when viewing in-flight weather information.