what does whitelist in a minecraft server mean?

Answer 1

a whitelist as a list of logins allowed on the server, if your not on the list you cant join

Comments

In a more detailed way, A whitelist if a special login list that only allows people who are registered on the list can join the server. If you want to be one a whitelist on a server, you usually have to fill out an application to be accepted by the server Admin's or the Servers Owner. Best Wishes
-Justin N