De or het rapportvergadering?

The correct Dutch article is:

de rapportvergadering

Rule Words ending in -ing: almost always de. See the rule

How to use rapportvergadering

the rapportvergaderingde rapportvergadering
this rapportvergaderingdeze rapportvergadering
that rapportvergaderingdie rapportvergadering
our rapportvergaderingonze rapportvergadering
your rapportvergaderingjouw rapportvergadering
every rapportvergaderingelke rapportvergadering
which rapportvergadering?welke rapportvergadering?
a big rapportvergadering / the big rapportvergaderingeen grote rapportvergadering, de grote rapportvergadering