Final answer:
The horizontal stabilizer trim priority is the order in which adjustments are made to the trim of the horizontal stabilizer of an aircraft.
Step-by-step explanation:
The horizontal stabilizer trim priority is the order in which adjustments are made to the trim of the horizontal stabilizer of an aircraft. The primary purpose of the horizontal stabilizer trim is to balance the aircraft around its lateral axis, ensuring that it maintains its desired pitch attitude. The priority in adjusting the horizontal stabilizer trim is to achieve this balance and maintain control of the aircraft.