This is a computer that acts as a server for other computers on the network. It can be a web server, an e-mail server, an FTP server, etc. For instance, a web host is what provides the content of web pages to the computers that access it. It is also known as the mother computer. Well, not really, I just made that up.
HOST
Meaning of HOST in English
English glossary of computer and Internet terms. Английский глоссарий компьютерных и Интернет терминов. 2012