an inland county of N central Republic of Ireland, in Connacht: economy based on cattle and sheep farming. County town: Roscommon. Pop: 53 774 (2002). Area: 2463 sq km (951 sq miles)
2. a former name for Galway (sense 3)
Roscommon in American English
(rɑsˈkɑmən)
county in Connacht province, WC Ireland: 951 sq mi (2,463 sq km); pop. 52,000