Plain English Meaning
A coded instruction in an instrument procedure that tells the aircraft to fly one lap of a holding pattern, then continue on once it crosses the holding fix.
Full Definition
An RNAV path-and-terminator leg type that defines a holding pattern which terminates at a designated fix. The aircraft flies the holding pattern until it crosses the fix, at which point the leg ends and the aircraft proceeds to the next leg of the procedure. HF legs are typically used for course reversals, altitude changes, or to absorb delay before continuing on a procedure.
Context Anchor
Seen in instrument procedure coding and GPS navigator sequencing for RNAV approaches, course reversals, and some missed-approach procedures.