In biology, an organism that is parasitized by another. In commensalism, the partner that does not benefit may also be called the host.
1. 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. Any organization that provides resources and facilities for a function or event.
3. Archaic term for army; SYN. legion.
4. The owner or manager of an inn; SYN. innkeeper.
The primary or controlling computer in a multiple part system.

To be the host of or for.

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

A plant that nourishes and supports a parasite; the host does not benefit and is often harmed by the association.

An animal that nourishes and supports a parasite; the host does not benefit and is often harmed by the association.

1. The main computer in a mainframe or minicomputer environment—that is, the computer to which terminals are connected.
2. In PC-based networks, a computer that provides access to other computers.
3. On the Internet or other large networks, a server computer that has access to other computers on the network. A host computer provides services, such as news, mail, or data, to computers that connect to it.

To provide services to client computers that connect from remote locations—for example, to offer Internet access or to be the source for a news or mail service.