Plain English Meaning
An instrument approach where the pilot follows a radio beam from a ground station for direction, and uses a separate distance signal to know how far they are from that station. Both pieces of information are required to fly the approach.
Full Definition
A published instrument approach procedure that requires both a VOR (VHF Omnidirectional Range) station for course guidance and DME (Distance Measuring Equipment) for distance information from a specified ground station. The pilot tracks a VOR radial inbound to the airport while using DME readings to identify , -down points, and the .