It has a west door above which is a three-light window with empty niches on each side.

There must have been an empty ecological niche and the lit-crits moved in.

Someone whose spending habits are out of control is trying to fill an empty niche with material possessions.

Yes, I'm lonely, but you don't fill my empty niches.

But in the place where a statue of Arnold should appear, there is an empty niche.

But unfortunately for Hyundai, this is far from an empty niche.

On the wall adjoining the one closest to the table desk was an empty niche.

After wandering the labyrinth for what felt like a day and a night, they finally found an empty niche.

Bolan watched him cross to an empty niche in the wall across from the window.

In other cases, the new species may fill a previously empty niche, and play a positive role.