What does the term 'taxi' refer to in aviation terminology?

In aviation terminology, the term 'taxi' specifically refers to the movement of an aircraft on the ground, particularly when it is traveling between the runway and the gate or vice versa. This phase occurs after the aircraft has been cleared for departure and is moving to the runway for takeoff, or alternatively, after landing when it is moving from the runway to the gate.

This definition is essential to understand because it distinguishes ground movement from other critical phases of aircraft operation, such as preparation for takeoff, which involves checklists and other pre-flight protocols, or boarding, which pertains to an entirely different operational activity involving passengers. Understanding this terminology is crucial for both aviation professionals and enthusiasts, as it helps clarify the various processes involved in flight operations and ensure effective communication within the aviation environment.