Definition - What does Root mean?
Techopedia explains Root
In a Windows-based system, "C:\" depicts the root directory of the C drive. However, on Macintosh and Unix based systems, a simple forward slash depicts the root directory. Root directories are not limited to operating systems; they are also used in URL addressing, which shows the domain name as the top level or root. This is followed by a forward slash to denote different pages or directories.