noun
an area that is dangerous or impossible to enter or to which entry is forbidden
• Regions: ↑United Kingdom, ↑UK, ↑U.K., ↑Britain, ↑United Kingdom of Great Britain and Northern Ireland, ↑Great Britain
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noun, pl ⋯ areas [count]
chiefly Brit : an area that is dangerous or where people are not allowed to go
He reported from one of the city's no-go areas.
— often used figuratively
Religion is a no-go area when you talk with her.
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an area, especially in a city, which is dangerous for people to enter, or that the police or army do not enter, often because it is controlled by a violent group: (figurative)
Some clubs are no-go areas for people over 30.
Useful english dictionary. 2012.