What is the definition of live object?

Hi All,
I wonder the exact definition of ‘live object’ in Python programming.
It’s mentioned in relation to inspect. However, it’s difficult to find the exact definition of ‘live’ object separately. This seems to be a general term, how does it have a different meaning from a general object? Is this related to callable property or internal structure of an object?

If I understand the question correctly, a live object is an object to which there is at least one reference.
that is, one that has not yet been removed by the garbage collector.

Sorry to ask again. But what do you mean by ‘at least one reference’? Could you please explain with detailed example?