a county, in the province of Connaught, Ireland, 25 miles in length, and as much in breadth; bounded on the east by that of Leitrim, on the west by the county of Mayo, on the north and north-west by the western ocean, and on the south and south-west by Sling by Roscommon and Mayo. It contains 5970 houses, 41 parishes, 6 baronies, 1 borough, and sends 4 members to parliament, two for the county, and two for the borough of the same name, which is the only market-town in the county, and is seated on a bay of the same name, 30 miles west of Killalla, and 110 north-east of Dublin. W. Long. 8. 26. N. Lat. 54. 13.