Please can anyone help me on the difference between a class and a metaclass in C++, the words seems ambigous to me.

C++ does not support metaclasses by default

well
...
Metaclasses are classes that, based on design, are capable of creating a mutuated version of a class, or an entirely new type of class... Which is used in your live working program... Real metaclasses do so on the fly. i.e, while your code is running...

Now, unto C++, ... @LordZouga is right..
Lemme clear some air...
...You'll hardly ever want real metaclasses in C++ like the type in Python... For C++, its like attempting to use juju(nigerian black magic) in your codes.

Though, you can emulate meta classes statically... But that may involve a lot of gymnastics with macros or ...the use of your metaclass' specific precompiler...
...these little emulations are mostly found in libraries for creating abstract state machines or cross platform libraries
but for the most of it,
...better primitives are available for dynamic Programming in C++...
Maybe you should get to read the concepts of
Resource Acquisition Is
Initialization (RAII), and Run - Time Type Identification (RTTI)... Understand them as simple as they are along with generic programming and API development...
This would help you write a software that is broadly applicable for its future use either by little upgrades, or attachment routines using the API...

Thanks so much to u guys, I really appreciate.