Meaning : Extended verbal expression in speech or writing.
Meaning : An extended communication (often interactive) dealing with some particular topic.
Example :
The book contains an excellent discussion of modal logic.
His treatment of the race question is badly biased.
Synonyms : discussion, treatment
Meaning : To consider or examine in speech or writing.
Example :
The author talks about the different aspects of this question.
The class discussed Dante's `Inferno'.
Synonyms : discuss, talk about
Meaning : Carry on a conversation.
Synonyms : converse
Meaning : Talk at length and formally about a topic.
Example :
The speaker dissertated about the social politics in 18th century England.
Synonyms : dissertate, hold forth