This is the 594th most frequent Dutch word.
haag
Hedge.
In this context, 'haag' refers to a hedge, a line of bushes or trees growing close together to form a barrier or boundary.
De haag rond de tuin zorgt voor privacy.
The hedge around the garden provides privacy.
Here, 'Haag' refers to a proper name for the Dutch city Den Haag, commonly translated as The Hague in English.
De stad Den Haag is de zetel van de Nederlandse regering.
The city of The Hague is the seat of the Dutch government.
Once again, 'haag' means a hedge in this sentence, specifically indicating a tangible botanical feature used as a boundary.