Source : Webster's Revised Unabridged Dictionary (1913)

Omnibus \Om"ni*bus\, n. [L., for all, dat. pl. from omnis all.
   Cf. {Bus}.]
   1. A long four-wheeled carriage, having seats for many
      people; especially, one with seats running lengthwise,
      used in conveying passengers short distances.

   2. (Glass Making) A sheet-iron cover for articles in a leer
      or annealing arch, to protect them from drafts.

   {Omnibus bill}, a legislative bill which provides for a
      number of miscellaneous enactments or appropriations.
      [Parliamentary Cant, U.S.]

   {Omnibus box}, a large box in a theater, on a level with the
      stage and having communication with it. [Eng.]
      --Thackeray.

Source : WordNet®

omnibus
     adj : providing for many things at once; "an omnibus law" [syn: {omnibus(a)}]
     n 1: an anthology of articles on a related subject or an
          anthology of the works of a single author
     2: a vehicle carrying many passengers; used for public
        transport; "he always rode the bus to work" [syn: {bus}, {autobus},
         {coach}, {charabanc}, {double-decker}, {jitney}, {motorbus},
         {motorcoach}]