Definitions:

1. Physically prevent access to a particular area or space by placing an object or barrier in the way. VERB
   • They blocked off part of the park for the annual festival, ensuring the event space was secure.
2. Setting aside or reserving certain amount of time for a specific purpose. VERB
   • Don't forget to block off some time to review your presentation before the conference.
3. To close or obstruct an area or passage to prevent access or use. VERB
   • The workers blocked off the street to complete the road repairs safely.
4. To disallow entry into a place by means of a physical barrier at the entry point. VERB
   • The police blocked off the area around the accident to keep onlookers at a safe distance.

Synonyms:

• barricade
• blockade
• close off
• enclose
• guard
• isolate
• obstruct
• wall off