The term dedicated server actually defines quite clearly what you get. But beware, a dedicated server can do much more than you think.
Basically, the word "Dedicated Server" refers to a server that is available with its entire performance exclusively to a single customer or a specific task or service. In contrast to a virtual server, it is a physical system including a static IP address, which concentrates its entire performance on one customer or task.
As a customer of Xelon, I also benefit from the possibility of placing the management of the server in our care. Whether Linux or Windows, with a managed dedicated server I define operating times, resources, and services and can lean back. We take care of hardening, patch, and update management, backup, and security (firewall, vulnerability scanning, 24/7 monitoring, etc.). Thanks to the web-based Plesk interface, managing websites, mail accounts, databases, etc. becomes a snap.