As a Noun: 1. A conversation between two people. English = dialogue. 2. A conversation between two or more people. English = discussion. As a Verb or Adjective: 1. To have a conversation with one other person; to have a dialogue. 2. To talk seriously with other people about something. English = discuss, confer. 3. In an academic context, to talk or write about a subject in detail, especially considering different ideas and opinions related to it. Academic/formal English = discuss.