Plain English Meaning
A guidance system that draws cues on the attitude display showing exactly how to pitch and bank the aircraft to fly the path you've selected. The pilot still hand-flies; the flight director just shows where to point the airplane.
Full Definition
An electronic flight instrument system that computes and displays steering commands on the attitude indicator, showing the pilot the precise pitch and bank attitudes required to follow a selected flight path, such as a heading, course, altitude, or instrument approach.
Context Anchor
Seen on aircraft with instrument displays, especially during , , , course , and .