Plain English Meaning
A landing practiced with the throttle pulled back to idle, where the pilot has to glide the airplane down and land exactly on a chosen spot on the runway without adding power.
Full Definition
Power-off accuracy approaches are training maneuvers in which the pilot reduces engine power to idle at a planned point and glides the airplane to a touchdown on a preselected spot on the runway, using only pitch, flaps, and flight path adjustments — not power — to control the descent and landing point.
Context Anchor
Seen in landing practice, , and training where the pilot must show they can judge and fly a without relying on power.