VFR over-the-top Regulation
VFR over-the-top, with respect to the operation of aircraft, means the operation of an aircraft over-the-top under VFR when it is not being operated on an IFR flight plan.
Also defined in 1 more source
A VFR operation in which an aircraft operates in VFR conditions on top of an undercast.
Guidance: Pilot's Handbook of Aeronautical Knowledge, p. G-33