What does close off mean?
close off
Definition
To put up barriers so that traffic or people cannot use a street, a bridge or an area for a while.
Example sentences
They've closed off our street for the festival, so I had to park three blocks away.
They've closed off our street for the festival, so I had to park three blocks away.
They close off the bridge at midnight now, and last night I got stuck on the wrong side of the river.