What does "feeling like your life is over" mean and why is it not in any dictionary online?

Read also:

• Can you fly an American flag in the UK in your own private property there? What is the UK’s government stance on that? And if yes, do you also have to fly the UK flag or the American flag can fly solo?
• What are some disadvantages of living in rural areas? What are the advantages?
• What was your first impression of The Carter V by Lil Wayne? Did it feel like 2008 Wayne, when you heard the first few songs.
• Are narcissists happy people generally?
• How do the Sola Scrptura folks react to the Dead Sea Scrolls and other more recent discoveries of ancient Biblical texts not among those canonized by Martin Luther?
• What are some important works of Marcel Proust (novelist)?
• If English makes 3 additional gender terms to accommodate for XXX, XXY, and XYY people, what would be the most realistic terms for those genders?
• What movies and TV shows portray realistic beauty standards?
• I've never read the book. What did Dorian Grey do that was so immoral and sinful?
• Why do men love boobs (irrespective of big or small)?
• What makes you feel guilty the most?
• If Russia needs the resources to fund the war in Ukraine, why doesn’t it throw open its doors to visa free western tourism? Enough people would be interested, & it would start to get some hard currency as €, CHF, £, SEK, $, JPY in the tills at shops.