whats the stream?and whats the meaning of this word in following sentence?

Question

in c++ cout is the stream object used to acces it.

Answer 1

stream is library for taking input and output if you will istream then it for input. ostream for output. iostream for input and output. fstream for file input.
actually it is a abstraction of constructor that allow to take and give input and output of unknow data like char ,string , array and all.
you can relate as stream of water if just a flow.
thanks.

Answer 2

@himanshu thanks for help🙏🙏