Lissart, You requested a definition of ‘Final Approach’. Annex 11
Final approach That part of an instrument approach procedure which commences at the specified final approach fix or point, or where such a fix or point is not specified:
(1) at the end of the last procedure turn, base turn, or inbound turn of a racetrack procedure, if specified, or
(2) at the point of interception of the last track specified in the approach procedure; and ends at a point in the vicinity of an aerodrome from which:
(a) a landing can be made; or
(b) a missed approach procedure is initiated. (ICAO Annex 11)