block off(redirected from blocks off)
To prevent access to a particular area or thing. We had to block off that section of the restaurant for a private party. I had to take a detour on my way home because the water department blocked off a bunch of streets. Some of the names on this list are blocked out, which means they're top secret.
block something off
to prevent movement through something by putting up a barrier; to close a passageway. Sam blocked the corridor off with a row of chairs. He used some chairs to block off the hallway.