Definition
The minimum safe distance maintained between an airplane and any obstacle, structure, vehicle, person, or other aircraft during taxi operations, sufficient to prevent contact under normal taxi conditions including wind, surface irregularities, and minor steering corrections.
Plain English
Enough space between your airplane and anything around it that you won't hit it while taxiing, even with small movements or wind gusts.
Context Anchor
Used during taxiing, especially when turning near parked aircraft, ramp equipment, runway signs, lights, or other obstacles.
Derivation
Clearance comes from clear, meaning free from obstruction or not blocked. In aviation, it often means having open space or permission; here it means open space around the airplane so it can move without hitting anything.
Why Pilots Care
Maintaining safe clearance prevents costly and dangerous ground incidents such as wing strikes or propeller damage.
Grounding Statement
While taxiing, the airplane takes up more space than just what the pilot can see straight ahead.
Intuition Check
Safe clearance does not mean “it looks like it will probably fit.” It means there is enough room for the entire airplane, including parts the pilot may not see well.
Example Sentence 1
Before taxiing past the row of parked aircraft, the pilot stopped to confirm safe clearance for both wingtips.
Example Sentence 2
Always verify safe clearance from fuel trucks and ground equipment when taxiing on the ramp.