Plain English Meaning
A recorded weather report you can listen to in the cockpit by tuning a specific radio navigation station. The recording is updated regularly and gives you weather along your route without having to call anyone.
Full Definition
A continuously recorded weather and aeronautical information broadcast transmitted over selected low-frequency (L/MF) navigation aids and some VORs in certain regions, allowing pilots to receive a route-oriented weather summary in flight by tuning the navaid frequency and listening on their audio panel.
Context Anchor
Seen in weather- discussions, especially in older training and in descriptions of weather broadcasts to pilots.