The southernmost part of an area or the southernmost place is the one that is farthest towards the south.
...the southernmost part of the island.
...Aswan, Egypt's southernmost city.
southernmost in British English
(ˈsʌðənˌməʊst)
adjective
situated or occurring farthest south
southernmost in American English
(ˈsʌðərnˌmoʊst)
adjective
farthest south
Examples of 'southernmost' in a sentence
southernmost
The magnolia trees in southernmost parts will blossom, but the daffodils of northerly areas will wait and wait.
Times, Sunday Times (2010)
The southernmost tip of the African continent is home to one of the planets most spectacular collections of wildlife.
Times, Sunday Times (2012)
The history of this southernmost tip of America can be discovered while wandering the colourful streets of the old town.
The Sun (2006)
Chile - the world's southernmost city.
The Sun (2008)
Now it is here, the southernmost point of Texas.
Times, Sunday Times (2014)
The Norwegians beat the British to the southernmost point of the globe again yesterday but this time they had to shed their skis and board an aircraft.