In my dissertation I defend the thesis that, when it comes to singular reference, the semantically significant context-sensitivity is not restricted solely to standard singular indexicals such as “I,” “now,” “he,” “today,” “this,” “that,” etc. In other words, the central thesis I defend is that in the case of other singular terms – most notably proper names and definite descriptions – their reference is, at least in some cases, conditioned by context of their use in such a way that it affects the propositional content and truth-conditions of sentences in which such singular terms occur. Agreeing with the direct reference theory I furthermore claim that the constituents singular terms contribute to the propositional content of sentences in which they occur are referents themselves, rather than some other descriptive of quantificational material. In thinking about the semantically significant context-sensitivity, as a model, I use context-sensitivity of standard indexicals. To assess the central thesis, and to think about context-sensitivity and its semantic significance generally, we need to be governed by such a model, or so I argue.