a Celtic term, denoting a hill or eminence, and which often concurs to form the names of towns, to signify their high situation, places of strength or castles; hills or eminences being adapted to such structures. See DUN.

(Ptolemy), a town of Ireland; now thought to be Down or Down-Patrick, in the county of Down. W. Long. 5. 57. N. Lat. 54. 23.