host

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

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

A vast multitude

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”

The owner or manager of an inn

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

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

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

Be the host of or for

“We hosted 4 couples last night”