Webster's Revised Unabridged Dictionary · 1913

Guest

Guest (gest) , noun

[Old English gest, Anglo-Saxon gast, gest; akin to Old Saxon, Dutch, & German gast, Icelandic gestr, Swedish gast, Danish Gjast, Gothic gasts, Russ. goste, and to Latin hostis enemy, stranger; the meaning stranger is the older one, but the root is unknown. Compare Host an army, Hostile.]

1.
A visitor; a person received and entertained in one's house or at one's table; a visitor entertained without pay.
To cheer his guests, whom he had stayed that night. — Spenser
True friendship's laws are by this rule exprest. Welcome the coming, speed the parting guest. — Pope
2.
A lodger or a boarder at a hotel, lodging house, or boarding house.
3.
(a) (Zoology) Any insect that lives in the nest of another without compulsion and usually not as a parasite.
(b)
(Zoology) An inquiline.

Guest , transitive verb

To receive or entertain hospitably. [Obsolete] — Sylvester

Guest , intransitive verb

To be, or act the part of, a guest. [Obsolete]
And tell me, best of princes, who he was That guested here so late. — Chapman