A word is ambiguous when it is susceptible to two (or more) quite distinct meanings, as when we are unsure whether the word "bank" refers to the side of the river or the place where we keep our money or whether a "vessel" is something into which we put water or something that floats upon it, but this is rarely an issue in statutory interpretation. In interpreting statutes or other legal texts, the problem is usually that the words have no clear meaning rather than one or another clear meaning, and the correct word for this phenomenon is "vagueness" and not "ambiguity."

Unknown, Frederick Schauer - Thinkin…, loc. 689