They begin to talk to each other and block up all the landing.
She had to find something to block up the window.
At some time the west gate was completely blocked up.
You'd think they'd block up the holes in this building.
He told her they were blocking up the whole aisle.
It seemed to stream out the front and be blocked up the back.
The children worked hard, and before half an hour had gone by the passage was completely blocked up.
You could tell she liked to block up a lot of traffic.
Well I can tell you now why are constantly blocked up.
In the 15th century, its three windows were all but blocked up because of the expanded keep.