Aberbrothwick Arbroath, or Aberbrothock, a royal and municipal burgh of Forfarshire, Scotland, on the North sea, at the mouth of the Brothwick or Brothock, 58 m. N. N. E. of Edinburgh; pop. in 1871, 19,974. The town has a signal tower communicating with the Bell Rock lighthouse, which has been celebrated by Southey as the Inch Cape Rock under the pious care of the abbot of Aberbrothock. The once powerful abbey of Arbroath, founded in 1178 by William the Lion, who is buried here, in honor of Thomas a Becket, was destroyed by the re-formers in 15G0. All that remains of it is the ruined church with its cloisters, and an east window with a circular light at the top, a conspicuous mark for sailors, who call it the "round O of Arbroath." The small harbor is protected by a breakwater. Between 400 and 500 vessels enter and leave the port annually, with between 30,000 and 40,000 tons. There are four annual fairs and a weekly market. The imports are tallow, flax, hemp, and linseed; the exports grain, paving stones, and the local manufactures of sailcloth, thread, and leather.