24-sussex-drive Definition
pronoun
(Canada) The office of Prime Minister of Canada.
Wiktionary
Origin of 24-sussex-drive
The street address of the Canadian prime minister's official residence, since 1951. Until about 1958, 24 Sussex Street (see also drive). The road was named in the early 19th century, after Prince Augustus Frederick, Duke of Sussex (1773–1843).
From Wiktionary