Definition
A standardized three- or four-character code assigned by the FAA, ICAO, or other recognized authority to uniquely identify an airport, navaid, fix, or other aeronautical point used in flight planning, ATC communications, and published procedures.
Plain English
A short code -- usually three or four letters -- that officially names a specific airport or navigation point so that pilots, controllers, and computers all refer to the exact same place.
Context Anchor
Seen in preferred instrument route listings, flight plans, charts, and procedure text when a route names places by code instead of by full name.
Why Pilots Care
Using the correct code prevents route ambiguity and ensures the clearance matches the intended airports and fixes.
Intuition Check
Do not assume this means a casual airport name, city name, or local nickname. In this context, it means the exact FAA-published code for the location.
Example Sentence 1
The pilot entered the official location identifier KPHX into the flight plan to specify Phoenix Sky Harbor as the destination.
Example Sentence 2
Confirm the official location identifier on the chart before entering it into the flight plan.