Noun:
1: 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
2: host, legion, horde a vast multitude
3: host an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association
4: master of ceremonies, emcee, host a person who acts as host at formal occasions (makes an introductory speech and introduces other speakers)
5: host, legion archaic terms for army
6: host any organization that provides resources and facilities for a function or event; "Atlanta was chosen to be host for the Olympic Games"
7: host (medicine) recipient of transplanted tissue or organ from a donor
8: innkeeper, boniface, host the owner or manager of an inn
9: host a technical name for the bread used in the service of Mass or Holy Communion
10: host, server (computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network
Verb:
1: host be the host of or for; "We hosted 4 couples last night"