an englishman's home is his castle

The phrase "an Englishman's home is his castle" refers to the idea that one's home is a place of privacy, security, and autonomy. It is an expression of the concept that within the boundaries of their home, an English person has the right to be protected, make decisions, and exercise authority without interference from the outside world. This saying emphasizes the importance of personal space and individual rights in one's own residence.