In the world of web hosting. A dedicated server belongs to the rental and full use of a computer which includes a Web server related to software and connection to the internet. In the Web Hosting Company’s premises.
Dedicated Server is a context sensitive expression. 
So your question is asked in the wrong context. What you rent at a Web Hosting Company is a dedicated GAME server.
Game engines differ between code running on a server and on clients. A client can´t run server code in general. A server can run both, client and server code and its named a listening server. In Conan Exiles your computer is running as a listening server if you are hosting a multiplayer game at home. You are the host for others and play the game at the same Computer.
A dedicated server is a server that can only run server code and did not load any modules that are needed to execute visual or audio instructions and anything else that is client only. So you could say that a dedicated server is optimized to be only a server and be the host for a bigger amount of clients. You need to connect to this server as a client.
A dedicated server will be a solitary PC in a system saved for serving the necessities of the system. HostNoc is provider of Dedicated server