Lismore, a town on the Blackwater, in the two counties of Cork and Waterford, and 43 miles SW. of Waterford city. The cathedral, the parish church since the see was united to Cashel, was rebuilt in 1663, on the site of a monastery founded before 540. The castle, originally founded in 1185, was the residence of the bishops till the 16th century. In 1587 it was given to Sir W. Raleigh, who sold it to the ' great' Earl of Cork, and In it his son, Robert Boyle, was born. In 1753 it passed to the Duke of Devonshire. Lismore returned two members from Charles I.'s reign to the Union. Pop. 1532.
Lismore' (Gael., 'great garden'), an island of Lorn, Argyllshire, in Loch Linnhe, 1 furlong from the mainland, and 8 miles N. of Oban. It rises to 417 feet, and is 10 1/2 miles long, 1 1/2 mile broad, and 6014 acres in area. Besides a lighthouse (1833), it contains several interesting remains - the choir of the cathedral (1236) of the pre-Reformation diocese of Lismore or Argyll (since 1749 used as the parish church); Achan-duin Castle, the residence of the bishops; and Castle- Rachal, a Scandinavian fort. Pop. (1831) 1790; (1901) 500, mostly Gaelic-speaking.