Excuse me, what is the sign of meeting a black cat at home? Thank you! !

From the perspective of divination, bad things will happen around you recently, which may be family or friends or yourself. In short, it will involve you and affect you.

From a theological point of view, there are evil spirits near your home, and black cats are specially used to ward off evil spirits, so they appear.

Realistically speaking, without warning, the cat was just passing by.