Definition
The current state of an airport's runways, taxiways, and ramp areas, including any contamination such as water, snow, slush, ice, or debris, as well as braking action reports and any closures or restrictions affecting aircraft operations.
Plain English
What the runways and taxiways are actually like right now — wet, dry, icy, snow-covered, partially closed, and how well the surface lets you brake and steer.
Context Anchor
Seen during preflight planning, weather briefings, NOTAM review, and approach planning when deciding whether an airport is usable.
Derivation
"Field" is an old aviation term for an airport, dating from when airports were literally grass fields. "Field conditions" therefore means the present state of the airport surface.
Why Pilots Care
Directly affects landing distance required, braking performance, and go/no-go decisions.
Intuition Check
Do not read “field” as open countryside here. In this aviation use, “field” means the airport or landing area, and “field conditions” means the usable condition of that airport.
Example Sentence 1
Before departure, the crew checked the latest field conditions and noted that Runway 27 was reported wet with fair braking action.
Example Sentence 2
Updated field conditions showed the runway had been cleared and braking action was now good.