a county in southern England on the English Channel; formerly an Anglo-Saxon kingdom that was captured by Wessex in the 9th century
"Visitors often drive through Sussex, a historic county and former Anglo-Saxon kingdom located on the south coast of England."
A placename
"Sussex is a historic county located in the south east of England."
A former county of south-east England, England, United Kingdom, now divided into East- and West-), then bordered by Surrey, Kent, Hampshire and the English Channel
"The historic county of Sussex was once bordered by Surrey, Kent, Hampshire, and the English Channel."
The name comes from the Old English word Sūþseaxan, meaning "South Saxons," referring to both the region and its inhabitants. While the civil parish takes its name directly from the town in New Brunswick, that American settlement likely derived its own name from Sussex, New Jersey.