What does the term 'taxi' refer to?

The term 'taxi' refers to the movement of the aircraft on the ground, which includes all movements that occur while the aircraft is not airborne. This encompasses the actions of the aircraft as it travels between the terminal and the runway, and vice versa. During taxiing, pilots use thrust to propel the aircraft on taxiways and runways at low speeds, guiding it to the appropriate positions before takeoff or after landing.

Understanding this terminology is crucial in aviation operations, as it helps distinguish between the different phases of flight, such as taxiing, takeoff, cruising, and landing. The other options relate to different aspects of aircraft operations, including refueling and preparation for flight, but do not accurately define what taxiing entails.