small seaport of Ireland, county Mayo, on a bay of the same name, 26 miles N.E. of Castlebar. Pop. 1446. It was formerly the seat of a bishopric, founded by St Patrick, united in 1607 to Achery, and to Tuam in 1833. The cathedral, a small but venerable building, is now used as the parish church; near it is a remarkable round tower. A French force under General Humbert landed here in 1798, and held the town for a short time.