Definition
A regulatory phrase used in FAA rules and airport operating documents meaning within the legally defined boundaries of an airport, including its movement areas, ramps, taxiways, runways, and surrounding airport property under the airport's jurisdiction. It is not limited to being physically inside a terminal building or on a runway.
Plain English
Anywhere on the airport's property — not just on the runway or inside the terminal. If you're on a taxiway, ramp, tie-down area, or any part of the field the airport controls, you're considered to be at the airport.
Context Anchor
Seen in aviation weather reports, forecasts, and weather briefings when describing where a condition is occurring or expected to occur.
Derivation
At from Old English meaning in the position of or engaged in; airport combines air with port meaning harbor for aircraft. The combination anchors the meaning to a fixed ground location rather than general proximity.
Why Pilots Care
Determines which set of rules, right-of-way priorities, or operating restrictions are in force during ground operations.
Grounding Statement
If a forecast says a condition is at an airport, picture it affecting the runways and immediate airport area.
Intuition Check
Do not read “at an airport” as “somewhere near the city where the airport is located.” Here it means the condition is close enough to apply to the airport area itself.
Example Sentence 1
The regulation prohibiting consumption of alcohol within eight hours of flight applies whenever the pilot is at an airport preparing to fly.