dialogue in WordNet English dictionary

1. the lines spoken by characters in drama or fiction
   dialogue  dialog 
   
2. a conversation between two persons
   dialogue  dialog  duologue 
   
3. a literary composition in the form of a conversation between two people
   "he has read Plato's Dialogues in the original Greek"
   dialogue  dialog 
   
4. a discussion intended to produce an agreement
   "the buyout negotiation lasted several days"; "they disagreed but kept an open dialogue"; "talks between Israelis and Palestinians"
   negotiation  dialogue  talks