Alumni

Alumni are people who used to go to a school, college, university, or other type of organization (like a club). They used to be part of that organization, but now they aren't. They are still part of that group, though, because they still have a connection to it. Alumni might still talk to people they used to know there, keep in touch with teachers, or meet up with other alumni. They often help out the organization by donating money or coming back to do talks or things like that.