This research aims to describe how practicing lawyers perceive 'plain writing' in the legal field and to conceptualize this notion through the discourse analysis of these specialists. To do so, a qualitative research framed in the interpretive paradigm has been developed. Specifically, 18 practicing lawyers, from different countries and with different specializations in the practicing of Law, were surveyed. After analyzing the discourse of the interviewed lawyers, eight macro categories accounting for plain language both generally and particularly were identified. The audience was identified as a key element in the production of legal texts which facilitate justice to citizens. Based on our analysis, we conclude with a definition of plain writing.