To grass over something (or grass something over) is to plant grass over an area of ground.
Examples of use:
1. I think we should grass over the patio.
2. They are grassing over the car park.
3. The old building site was grassed over and a children’s playground built on the land.
||grass over and grasses over|
Practise your English and see if you can write a sentence using this phrasal verb
Can you think of an area of land that has been grassed over?
Image © Dominic Alves