What does it mean exactly "religious comeback"? Social scientists, historians, philosophers have debated on it since Nineties. One aspect of particular relevance is that of the concepts and the words chosen: their origins, different meanings and uses in different contexts, disciplines and languages. The aim of this paper is to make the point on such different uses and on the theories behind them, from secular to postsecular, from secularism to laïcité.
Keywords: Laicità, secolarizzazione, postsecolare, pluralismo, secolare.