ARUNDEL, a borough and market town in the county of Sussex, 57 miles from London. It is situated on the declivity of a hill, on the north bank of the river Arun, which is navigable for vessels of 200 tons, and consists of two principal streets, containing several houses of a superior class. Adjoining to it is the magnificent castle of the dukes of Norfolk. The municipal government is vested in a mayor, four aldermen, and twelve councillors. It returns one member to parliament. Its chief trade is in corn and timber. Pop. in 1851, 2748.