Vagueness is to be distinguished from ambiguity, though rather fittingly the distinction is vague! An ambiguous term is one with more than one meaning, whereas vagueness is characteristic of a single meaning that has borderline cases.However, it is not unusual for a term to be both ambiguous and vague; in fact, this is the usual case.agueness is to be distinguished from ambiguity, though rather fittingly the distinction is vague! An ambiguous term is one with more than one meaning, whereas vagueness is characteristic of a single meaning that has borderline cases.