Used when you hope to not deal with something again, but it's uncertain. She transferred schools, believing she'd seen the last of her bullies.
Pro Tip 2/3
Often Ironic
May be used ironically when something unwanted keeps reappearing. Just when I thought I'd heard the last of that song, it played again.
Pro Tip 3/3
Personal Relief
Expresses personal relief at the end of an unwelcome situation. After the noisy construction ended, residents hoped they'd seen the last of the disruption.