(obsolete) Interaction; commerce or intercourse between people.
(obsolete) Sexual intercourse.
(archaic) Behaviour, the way one conducts oneself; a person's way of life.
Expression and exchange of individual ideas through talking with other people; also, a set instance or occasion of such talking.
I had an interesting Conversation with Nicolas yesterday about how much he's getting paid.
(fencing) The back-and-forth play of the blades in a bout.