dis·course

– noun
1. communication of thought by words; talk; conversation.
2. a formal discussion of a subject in speech or writing, as a dissertation, treatise, sermon, etc.
3. any unit of connected speech or writing longer than a sentence.
– verb
4. to communicate thoughts orally; talk; converse.
5. to treat of a subject formally in speech or writing.
6. to utter or give forth (musical sound).

dis·cur·sive

– adj.
1. passing aimlessly from one subject to another; digressive; rambling.
2. proceeding by reasoning or argument rather than intuition.