Plain English Meaning
A point on a chart that you must fly directly over before turning. You are not allowed to cut the corner early -- you cross the point first, then turn.
Full Definition
A waypoint on an instrument procedure chart that the aircraft must cross directly overhead before beginning a turn or transitioning to the next leg. Depicted on charts by a four-pointed star enclosed within a circle, distinguishing it from a fly-by waypoint, which permits the aircraft to begin the turn before reaching the point.
Context Anchor
Seen on departure and arrival procedure chart legends, especially where the chart is showing how to follow a route through specific named points.
Why Pilots Care
Ensures the aircraft follows the published path for and .