Definition of "Host" :
noun: an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association
noun: (computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network
noun: a technical name for the bread used in the service of Mass or Holy Communion
noun: a vast multitude
noun: archaic terms for army
noun: any organization that provides resources and facilities for a function or event
"Atlanta was chosen to be host for the Olympic Games."
noun: the owner or manager of an inn
noun: a person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are there
noun: (medicine) recipient of transplanted tissue or organ from a donor
noun: a person who acts as host at formal occasions (makes an introductory speech and introduces other speakers)
verb: be the host of or for
"We hosted 4 couples last night."