ARNE, a chapelry in the parish of HOLY-TRINITY-WAREHAM, hundred of HASILOR, Blandford (South) division of the county of DORSET, 4 miles (E. by N.) from Wareham, containing 134 inhabitants. The living is a perpetual curacy, in the archdeaconry of Dorset, and diocese of Bristol, and in the patronage of the Rector of Wareham. The chapel is dedicated to St. Nicholas. The village stands on the shore of Poole harbour, between Wareham and Brownsey island. On the summit of an eminence connected with a bank of gravel or pebbles, extending north-eastward into the harbour, there is a large barrow, which has been used as a beacon.