Plain English Meaning
The path you drive your airplane along on the ground to get from where you are to where you need to go on the airport.
Full Definition
The specific path an aircraft follows on the airport surface between the parking area, runway, and other points such as run-up areas or hangars, using designated taxiways and other movement areas as directed by ground control or airport signage and markings.
Context Anchor
You encounter this term during ground operations, especially when preparing to taxi from the ramp to the runway or after landing and leaving the runway.