To value, do, or choose something first, or before other things.
When I don't have time to buy everything at the store, I prioritize fresh fruit and vegetables over foods like rice or noodles.
Boeing's article stressed prioritizing roll control during recovery from nose-down bank upsets unless the airplane was in a stall condition; if the airplane was stalled, Boeing recommended recovering from the stall before recovering from the upset. The article described the nose-down upset recovery technique as follows: "Reduce angle of attack. This unloads the wing, allows the airplane to accelerate, which reduces rudder deflection and improves lateral control ability. […]"