Definition
The current weight and balance state of the aircraft, including total weight, distribution of that weight, and resulting center of gravity location, all of which affect how the aircraft handles, climbs, and responds to control inputs.
Plain English
How heavy the aircraft is right now and how that weight is spread out inside it. A light aircraft with two people up front handles differently from the same aircraft loaded with four people, full fuel, and baggage in the back.
Context Anchor
Seen in instrument flying when setting up and holding a straight climb at a constant airspeed or constant rate.
Derivation
From 'load' (what is being carried) and 'condition' (the present state of something). Together: the present state of what the aircraft is carrying. The aviation use is straightforward — it just makes explicit that loading is not fixed; it changes from flight to flight.
Why Pilots Care
The same pitch attitude and power setting will produce different climb performance depending on the load condition. A heavier or aft-loaded aircraft needs different control inputs to achieve the same result, and pilots must adjust their expectations and technique accordingly.
Intuition Check
Load condition does not mean a weather condition or a problem with the airplane. Here, it means the airplane’s present weight and weight placement.
Example Sentence 1
With four people on board and full fuel, the load condition required a higher pitch attitude and more power to maintain the target climb rate.
Example Sentence 2
A forward center of gravity in this load condition required slightly more nose-up trim during the climb.