Plain English Meaning
Stored data points in the aircraft's navigation database that tell the system where each named waypoint is located on Earth.
Full Definition
Database entries used by RNAV and FMS equipment that define named geographic points (fixes) by their latitude and longitude, along with associated data such as identifier, type, and reference navaid. Fix records are part of the navigation database that allows the aircraft's flight management system to locate and sequence waypoints along a procedure or route.