From Longman Dictionary of Contemporary Englishrun/extend the (full) width of somethingrun/extend the (full) width of somethingto exist from one side of something to the other a covered terrace extending the full width of the house → width
Examples from the Corpus
run/extend the (full) width of something• The room she entered ran the width of the house, with windows at both ends.• It ran the width of the ship and was full of machinery.• She led them on to a small covered terrace running the full width of the house.• Even the view from the big window that runs the width of her office is unadorned. 