In this paper we focus on linguistic negation, i.e. the way to handle negative statements while making a decision. Indeed negation is an important issue in decision making, especially when data are provided by human beings where vagueness, ignorance and uncertainty are high. This article highlights the existing works about negation in semiotics and semantics. It is an attempt to give clues to model linguistic negation while building bridges between the 2-tuple fuzzy linguistic representation model and semantics.