A server that has been abandoned, and nobody is on except you. Commonly seen in older games that were the first to get online such as Dues Ex, Halo, Doom. On a Dead Server, you feel lonely.

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

A server that used to be booming and have lots of active people, but now has only 3-5 active people

A server that is no longer used by many people and instead only a few. dead servers typically have a lot of people in it but only have 3-4 active people. some dead servers turn into wastelands, where no one is even alive