Definitions of host:

• noun:   an animal or plant that nourishes and supports a parasite; the host does not benefit and is often harmed by the association
• noun:   a technical name for the bread used in the service of Mass or Holy Communion
• noun:   archaic terms for army
• noun:   any organization that provides resources and facilities for a function or event

  Example: "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:   (computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network
• noun:   a vast multitude
• 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

  Example: "We hosted 4 couples last night"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #15475)