The Collaborative International Dictionary of English v.0.48:

Guest \Guest\, v. t.
   To receive or entertain hospitably. [Obs.] --Sylvester.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Guest \Guest\, v. i.
   To be, or act the part of, a guest. [Obs.]
   [1913 Webster]

         And tell me, best of princes, who he was
         That guested here so late.               --Chapman.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Guest \Guest\ (g[e^]st), n. [OE. gest, AS. g[ae]st, gest; akin
   to OS., D., & G. gast, Icel. gestr, Sw. g[aum]st, Dan.
   Gj[aum]st, Goth. gasts, Russ. goste, and to L. hostis enemy,
   stranger; the meaning stranger is the older one, but the root
   is unknown. Cf. 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.
      [1913 Webster]

            To cheer his guests, whom he had stayed that night.
                                                  --Spenser.
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            True friendship's laws are by this rule exprest.
            Welcome the coming, speed the parting guest. --Pope.
      [1913 Webster]

   2. A lodger or a boarder at a hotel, lodging house, or
      boarding house.
      [1913 Webster]

   3. (Zool.)
      (a) Any insect that lives in the nest of another without
          compulsion and usually not as a parasite.
      (b) An inquiline.
          [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

guest
    n 1: a visitor to whom hospitality is extended [syn: guest,
         invitee]
    2: United States journalist (born in England) noted for his
       syndicated homey verse (1881-1959) [syn: Guest, Edgar
       Guest, Edgar Albert Guest]
    3: a customer of a hotel or restaurant etc.
    4: (computer science) any computer that is hooked up to a
       computer network [syn: node, client, guest]