HOLT, a municipal and parliamentary borough of North Wales, Denbighshire, on the Dee, which is here crossed by an old bridge of ten arches. Some traces still remain of Holt Castle, which having been garrisoned for Charles I. was taken and dismantled by the parliamentary forces in 1645. Holt is governed by a mayor, two bailiffs, &c., and is a contributory borough to Wrexham. Pop. (1851) 1029.