‘Dialogue’ is an important concept in the contemporary world. It plays a very significant role in English public discourse, and through English, or mainly through English, it has spread throughout the world. For example, the dissident leader Aung San Suu Kyi calls for ‘reconciliation and dialogue’ in Burma, the Russian pro-democracy groups ask Russian President Vladimir Putin to ‘begin a dialogue’ with them, and Popes Paul VI and John Paul II are praised for opening the Catholic Church to a ‘dialogue’ (...) with other Christian churches and other religions, and so on. But what exactly does the word ‘dialogue’ mean? In his position statement for the plenary session on ‘dialogue in cross-cultural perspective’, Donal Carbaugh asks: ‘What constitutes “dialogue”? What is this form of communicative action? Is there such a form, or something like it, in various speech communities?’. This article attempts to answer Carbaugh’s questions from the point of view of the NSM theory of semantics, developed by the author and colleagues. (shrink)