What Does Standalone Server Mean?

A standalone server is a server that runs alone and is not a part of a group. In fact, in the context of Microsoft Windows networks, a standalone server is one that does not belong to or is not governed by a Windows domain. This kind of server is not a domain member and functions more as a workgroup server, so its use makes more sense in local settings where complex security and authentication may not be required.

Techopedia Explains Standalone Server

A standalone server provides local authentication and access control for any resources available from it, and it usually does not provide network logon services. This usually means that this kind of server uses a local user database and is available either in user mode or in share mode.