[ C ] computing specialized（计算机系统、网站、网络等）管理员 short for administrator : a person who is in charge of the operation of a network of computers, a website, a group of computer users, etc., and is able to make changes to it
Only admins can add people to the group chat or change the name of the group. 只有管理员可以添加群聊成员或更改群组名称。
a network/server/site/domain admin
I have full admin rights on the network.