Expression and exchange of individual ideas through talking with other people; also, a set instance or occasion of such talking.
The protocol-based interaction between systems processing a transaction.
The back-and-forth play of the blades in a bout.
To engage in conversation (with).
A personal relationship between two people.
Matching each member of one set with exactly one member of another set.
Injective, being an injection: having the property that no two elements of the domain are mapped to the same image.
Involving direct communication between two people.