Sussex /ˈsʌs.ɪks/ noun3 •A former county of south-east England, England, United Kingdom, now divided into East and West Sussex, then bordered by Surrey, Kent, Hampshire and the English Channel. •A British breed of dual-purpose chicken, reared both for its meat and for its eggs.In the USSR, Sussexes are distributed in the western and southern parts of the Ukrainian SSR. — 1968 •Ellipsis of Sussex Drive and Sussex Street: a street in Ottawa, Ontario, Canada, on which the residence of the Prime Minister of Canada and the Governor General of Canada are located. formsSussexes