What is C++ abstract machine

  abstract-machine, c++, memory-model

Well, I know Java has JVM and I’ve used C++ for 5 years and I don’t think there is any C++ abstract machine. However, today I read this link: https://en.cppreference.com/w/cpp/language/memory_model and it said:

Defines the semantics of computer memory storage for the purpose of the C++ abstract machine.

What does it mean by "the C++ abstract machine"? It is’t not the same with JVM, how should we understand it?

Source: Windows Questions C++