The phrasal verb "close off" is predominantly used in informal speech, though it may appear in formal contexts related particularly to logistics, construction, or planning documents. This verb typically means to block or seal an entry or section, preventing access or passage. For example, a road might be 'closed off' for repair work, or certain areas within a building could be 'closed off' during an event. Beyond physical spaces, "close off" can have a metaphorical application, such as someone emotionally distancing themselves from others or being unresponsive, e.g., "After the incident, she closed herself off from her friends." This broad range of uses highlights its flexibility in describing both tangible and intangible boundaries.
B1
PreIntermediate
1. To block or seal an area or pathway so that it cannot be used or accessed.
Authorities decided to close off the main road due to flooding.
They will close off the park for maintenance work next week.
2. To end or stop communication or a relationship.
After the argument, he chose to close off all communication with her.
She decided to close off from the rest of the team after the disagreement.