Gerund acts as a subject, object... But can't we say that Gerund is basically a noun.
Also, I heard a counter argument - a noun can be used for showing possession (John's chair)... But Gerund can't be used in such a manner(can it?). So, Gerund doesn't work as a noun.
So, basically, my question is that -- "What is Gerund?" In an advanced manner. Also, I would be very grateful if you could cite your sources. Thanks, in advance!