DON, a river of Scotland, Aberdeenshire, rising in Ben Aven, near the N.W. boundary of the county, and after a course of 62 miles falling into the German Ocean about a mile and a half north of Aberdeen. Not far from its mouth it is crossed by the "Brig of Balgownie," an old Gothic one-arched bridge celebrated by Lord Byron; and a little farther down is a new bridge of five arches.