Technical words and meanings

Hello everybody.

So as I am learning C++, I come across a lot of technical terms. I've written them down so I will add them here:

Instance
Object
Parameter
pointers
null pointers
instantiate
iterate
composition
aggregation
referencing
member of a class
polymorphism
abstract classes

I have no idea what these words actually mean, but it comes up a lot! I am wondering if it is possible if someone can give me a definition of these words or a link to a website explaining what these technical words mean?

Thank you.
Google
Wikipedia
This site?
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