Administrative divisions:

3 regions (French: régions, singular - région; Dutch: gewesten, singular - gewest); Brussels-Capital Region, also known as Brussels Hoofdstedelijk Gewest (Dutch), Region de Bruxelles-Capitale (French long form), Bruxelles-Capitale (French short form); Flemish Region (Flanders), also known as Vlaams Gewest (Dutch long form), Vlaanderen (Dutch short form), Région Flamande (French long form), Flandre (French short form); Walloon Region (Wallonia), also known as Région Wallonne (French long form), Wallonie (French short form), Waals Gewest (Dutch long form), Wallonie (Dutch short form)

note: as a result of the 1993 constitutional revision that furthered devolution into a federal state, there are now three levels of government (federal, regional, and linguistic community) with a complex division of responsibilities; the 2012 sixth state reform transferred additional competencies from the federal state to the regions and linguistic communities

Definition:

This entry gives the numbers, designatory terms, and first-order administrative divisions as approved by the US Board on Geographic Names (BGN). Changes that have been reported but not yet acted on by the BGN are noted. Geographic names conform to spellings approved by the BGN with the exception of the omission of diacritical marks and special characters.

Source: CIA World Factbook