This is the 3387th most frequent Russian word.
последняя
"Последняя" means "last" or "final" in English.
The word 'последняя' here means 'last' in the sense of final.
Это была её последняя попытка.
This was her last attempt.
The word 'последняя' refers to a specific 'last' period of time within a finite range.
На последнюю неделю отпуска она поехала к морю.
She went to the sea for the last week of her vacation.
Here, 'последняя' is used to denote the most recent publication by the author.