noun A person who receives or entertains other people as guests. (a dinner-party host) An animal or plant on or in which a parasite or commensal organism lives. A person or animal that has received transplanted tissue or a transplanted organ. A computer that mediates multiple access to databases mounted on it or provides other services to a computer network.
verb Act as host at (an event) or for (a television or radio program). Store (a website or other data) on a server or other computer so that it can be accessed over the Internet. (Columbia University currently hosts some 400 websites)
noun A large number of people or things. (a host of memories rushed into her mind)
noun The bread consecrated in the Eucharist. (the elevation of the Host)