RhymeZone: hostname definitions

Definitions of hostname:

noun: (networking) The unique name by which any device attached to a computer network is known.
noun: (computing, Internet) A computer or other network device's Internet domain name; a fully qualified hostname.
noun: (computing, Internet) The portion of a computer's Internet domain name that comes before the first period; an unqualified hostname.

(Definitions from Wiktionary)