Host

Host can mean:

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• In general English, the term host can refer to a person, organisation, animal, cell, computer or similar that receives guests or intruders
• In television or radio, the host of a show is the person who presents it - for example Jay Leno is the current host of The Tonight Show.
• In biology, a host organism harbors a parasite, mutual partner, or commensal partner, typically providing nourishment and shelter. A host can also refer to a cell infected by a virus See host (biology) for detail and also symbiosis
• In psychology and mental health, a host represents the most important (to therapeutic goals) mental entity in someone who has Dissociative Identity Disorder (DID, formerly known as Multiple Personality Disorder or MPD). See host (psychology)
• In Japan, a host or hostess provides escort services services for paying customers, usually in host clubs. These services may or may not be of sexual nature.
• In computing, host is any machine connected to a computer network, a node that has a hostname. A more specific meaning is that hosts are servers.
• A host file is a file stored on the computer's filesystem that serves to look up the Internet Protocol address of a device connected to a network
• A web host is a company or individual who offers web space and sometimes a domain name, in exchange for services and/or money
• A bastion host is a machine that serves to control access between a private network and a public one (such as the Internet)
• Host, an album released by the heavy metal/goth metal band Paradise Lost in 1999
• A host may also consist of a large group, such as an army or a large number of people under a single cause or banner. Typical usage in English might generate the clause: "a host of US troops invaded Iraq in 2003". In the Bible, the heavenly host means "chorus or army of angels"
• In Roman Catholicism and Eastern Orthodoxy, the host names the transubstantiated bread in the Eucharist. See also viaticum.
• In host-guest chemistry a host molecule, such as a receptor, can receive a guest, such as a ligand