De or het overlapping?

The correct Dutch article is:

de overlapping

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

How to use overlapping

the overlappingde overlapping
this overlappingdeze overlapping
that overlappingdie overlapping
our overlappingonze overlapping
your overlappingjouw overlapping
every overlappingelke overlapping
which overlapping?welke overlapping?
a big overlapping / the big overlappingeen grote overlapping, de grote overlapping