Final Approach-IFR

Part of an instrument approach procedure in which alignment and descent for landing are accomplished. (PHAK definition).

The flight path of an aircraft which is inbound to an airport on a final instrument approach course, beginning at the final approach fix or point and extending to the airport or the point where a circle-to-land maneuver or a missed approach is executed. (PCG definition).

Source: Pilot Handbook of Aeronatical Knowledge, PCG