n. One who is a recipient of hospitality at the home or table of another.n. One to whom entertainment or hospitality has been extended by another in the role of host or hostess, as at a party.n. One who pays for meals or accommodations at a restaurant, hotel, or other establishment; a patron.n. A distinguished visitor to whom the hospitality of an institution, city, or government is extended.n. A visiting performer, speaker, or contestant, as on a radio or television program.n. Zoology A commensal organism, especially an insect that lives in the nest or burrow of another species.v. To entertain as a guest.verb-intransitive. To appear as a guest: guested on a television series. adj. Provided for guests: guest rooms. adj. Participating as a guest: a guest conductor.