host

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

a vast multitude

an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association

a person who acts as host at formal occasions (makes an introductory speech and introduces other speakers)

archaic terms for army

any organization that provides resources and facilities for a function or event; "Atlanta was chosen to be host for the Olympic Games"

(medicine) recipient of transplanted tissue or organ from a donor

the owner or manager of an inn

a technical name for the bread used in the service of Mass or Holy Communion

(computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network

be the host of or for; "We hosted 4 couples last night"