Definition
to obstruct a road, pathway, or entrance to prevent its use by others
封鎖（道路）；關閉（出入口）
The police blocked off the road due to an accident.
警方因事故封鎖了道路。
They blocked off the entrance to the building during the construction.
他們在施工期間關閉了大樓的入口。
For safety reasons, the company decided to block off certain areas.
基於安全考量，公司決定封鎖某些區域。