I am sorry for not being able to give you some context about this. I found this phrase from the "Pearson Academic Words List". I tried a few dictionaries even, but still not able to understand the real meaning of this. Please give me the meaning and some example of the usage of it.
It means a "longer and more detailed discussion". In this context a discussion is probably not a spoken conversation, but a piece of academic writing that considers multiple points of view.
Programmers in C++ should avoid
using namespace std. For a fuller discussion of why this is the case, read the answers to Why is “using namespace std;” considered bad practice?