Plain English Meaning
Pointing the nose of the aircraft straight at a radio station and flying toward it. If there's a crosswind, the wind blows you sideways as you go, so your actual path through the air curves until you reach the station.
Full Definition
Flight toward a navigational aid by keeping the aircraft's heading pointed directly at the station, without correcting for wind drift. Because the wind continuously pushes the aircraft off the direct line, the resulting flight path becomes a curved track that eventually arrives over the station.
Context Anchor
Seen in radio navigation when a pilot is using an indication to fly toward a station or .