guest 
(gĕst)
(gĕst)n.
1. One who is a recipient of hospitality at the home or table of another.
2. One to whom entertainment or hospitality has been extended by another in the role of host or hostess, as at a party.
3. One who pays for meals or accommodations at a restaurant, hotel, or other establishment; a patron.
4. A distinguished visitor to whom the hospitality of an institution, city, or government is extended.
5. A visiting performer, speaker, or contestant, as on a radio or television program.
6. Zoology A commensal organism, especially an insect that lives in the nest or burrow of another species.
v. guest·ed, guest·ing, guests
v.tr.
To entertain as a guest.
v.intr.
To appear as a guest: guested on a television series.
adj.
1. Provided for guests: guest rooms.
2. Participating as a guest: a guest conductor.
[Middle English gest, from Old Norse gestr; see ghos-ti- in the Appendix of Indo-European roots.]