TKD Addendum.

This is referring to side-to-side distance, not things like a "broad topic" or "wide range of opinion" or "eyes wide open".

It was confirmed at qepHom 2025 that both lang and vaS can be used for both meanings of the outer measures of a thing, but also the inner measurement of an opening, for instance. So it also works for "a narrow street" or to say things like "The hole is too narrow to fit my hand in."