 Interestingly, there are views regarding vague language that treat vagueness as at least akin to ambiguity. Braun and Sider (2007) treat sentences with vague terms as expressing multiple distinct propositions and supervaluationism treats vague terms as expressing multiple distinct semantic values. But the relevant notion of multiple expression seem different from paradigmatic ambiguity, where two meanings are definitely meanings of a term or phrase, not where a bunch of meanings are acceptable ways of making a term more precise. If anything, one might think that these views treat vagueness as a sort of polysemy.