What is the definition of a flight in aviation terms?

The definition of a flight in aviation terms specifically refers to the movement of an airplane from takeoff to landing. This encompasses the entire duration during which an aircraft is airborne, beginning when it leaves the ground and concluding when it safely touches down. This understanding is critical as it distinguishes the active phase of aviation operations from other related activities.

The other options refer to supplementary aspects of aviation but do not define what constitutes a flight. Preparation before departure is vital for ensuring everything is in order before takeoff, but it does not involve the actual airborne journey. Time spent on the ground is a part of an aircraft’s schedule but is not included in the definition of flight since it implies inaction rather than the act of flying itself. Lastly, maintenance checks, while essential for safety and functionality, occur when the aircraft is not in the air, further establishing that they aren't relevant to the definition of a flight.