A maritime county of North Wales, between Lancashire and Denbigh, of which a detached portion lies to the N. of Shropshire; low stretches of sand form its foreshore, but inland it is hilly, with here and there a picturesque and fertile valley in which dairy-farming is extensively carried on. 2, a seaport, on the estuary of the Dee, 13 m. NW. of Chester; has ruins of a castle with interesting historical associations; in the neighbourhood are copper-works and lead and coal mines.