saint george's channel

noun

1. a channel between Wales and Ireland, connecting the Irish Sea and the Atlantic. 100 miles (160 km) long; 50–90 miles (81–145 km) wide.

noun usually abbreviated to: St George’s Channel

1. a strait between Wales and Ireland, linking the Irish Sea with the Atlantic. Length: about 160 km (100 miles). Width: up to 145 km (90 miles)