Plain English Meaning
The controller is telling you exactly which heading to fly, using radar to steer you where they want you to go.
Full Definition
Being given specific headings to fly by an air traffic controller who is using radar to guide the aircraft along a desired ground track, typically for navigation, traffic separation, sequencing, or to position the aircraft for an approach.
Context Anchor
Seen in IFR flying and landing minimums discussions when ATC guides an aircraft toward an approach instead of the pilot navigating the entire path independently.