Definitions for "Regierungsbezirk"
In Germany, this is the administrative division between "Bundesländer" [German federal states] and "Landkreise" [administrative districts].
A Regierungsbezirk is a government region of Germany, a subdivision of certain federal states (Bundesländer). Regierungsbezirke are themselves further divided into districts (Kreise), either Landkreise or urban districts: cities which constitute a district in their own right (kreisfreie Städte). The Regierungsbezirk is governed by a Bezirksregierung and led by a Regierungspräsident.
An administrative sector of a federal state (Land).