De or het postunie?

The correct Dutch article is:

de postunie

  • Plural: de postunies
Meaning (Dutch) (post) internationale overeenkomst betreffende het vervoer van poststukken, de te heffen porto en de verrekening hiervan onderling

How to use postunie

the postuniede postunie
this postuniedeze postunie
that postuniedie postunie
our postunieonze postunie
your postuniejouw postunie
every postunieelke postunie
which postunie?welke postunie?
a big postunie / the big postunieeen grote postunie, de grote postunie
the postunie (plural)de postunies, deze postunies

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).