to die or disappear slowly until gone, to not exist anymore
The campfire slowly died out and we went to bed.
Dinosaurs died out many years ago.
How to Get a PhD
Despite the reputation of academics as absentminded Professors, getting a PhD takes an ordered mind. Learn to prioritize tasks and relegate lesscritical chores until later. Do one thing at a time. Break large jobs down into smaller manageable tasks that you can complete and move on.