Plain English Meaning
The physical parts that link what the pilot moves in the cockpit to what actually moves on the wings and tail. When you push the rudder pedal, these parts carry that movement out to the rudder.
Full Definition
The mechanical components — typically cables, push-pull rods, pulleys, bellcranks, and torque tubes — that physically connect the pilot's flight controls in the cockpit to the movable control surfaces on the aircraft (ailerons, elevator, and rudder).
Context Anchor
Seen in primary descriptions, control checks, and discussions about how input reaches the ’s moving surfaces.