Theories of descriptions tend to involve commitments about the ambiguity of descriptions. For example, sentences containing descriptions are widely taken to be ambiguous between de re, de dicto, and intermediate interpretations and are sometimes thought to be ambiguous between the former and directly referential interpretations. I provide arguments to suggest that none of these interpretations are due to ambiguities (or indexicality). On the other hand, I argue that descriptions are ambiguous between the above family of interpretations and what may be called 'institutional' as well as generic interpretations. My arguments suggest that an adequate theory of descriptions may require considerable rethinking. Most contemporary theories of descr...