Part of speech: Noun
extended verbal expression in speech or writing
Part of speech: Noun
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
Part of speech: Noun
an address of a religious nature (usually delivered during a church service)
Part of speech: Verb
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
Part of speech: Verb
talk at length and formally about a topic
Example: The speaker dissertated about the social politics in 18th century England
Part of speech: Verb
carry on a conversation
Talk about, Hold forth, Converse, Discourse, Dissertate