Meaning of DIALOGUE in English

n. (US dialog)

1. a conversation. b conversation in written form; this as a form of composition.

2 a a discussion, esp. one between representatives of two political groups. b a conversation, a talk (long dialogues between the two main characters).

Etymology: ME f. OF dialoge f. L dialogus f. Gk dialogos f. dialegomai converse

Oxford English vocab.      Оксфордский английский словарь.