forbidden zone

noun
UK /fəˈbɪd.ən zəʊn/
US /fɚˈbɪd.ən zoʊn/

A forbidden zone is a place where people are not allowed to go.

The soldiers guarded the forbidden zone near the border.


OTHER MEANINGS

2. An area in a video game that players cannot enter.

The character could not cross the invisible forbidden zone at the edge of the map.

3. A region that is dangerous and must be avoided.

After the chemical leak, the factory became a forbidden zone.

4. A topic or subject that people are not supposed to discuss.

In that family, money was a forbidden zone at dinner.