The aim of this chapter is to examine the meaning of the N domaine in NPs like le domaine de la chimie (the chemistry field). Whereas in a NP like le domaine de l’olivier, the distinction between the referent of the whole NP (i.e. the territory where olive trees can grow) and the referent of its adjunct (the olive trees) is obvious, the same distinction does not apply to le domaine de la chimie. We will show that in such NPs the N domaine refers to an abstract field involving all human activities related to the referent of the complement (la chimie). This referent is therefore part of a whole the unity of which it ensures, and because of this relation its name can apply to the whole it belongs to. For this reason, la chimie can have the same meaning as le domaine de la chimie.