An omnibus is another word for a bus, as in a large vehicle carrying lots of passengers. Other names are autobus and coach.

This word has bus in it, and that's the main meaning of omnibus. As a book, an omnibus is collection of articles either all on the same subject or written by a single author. An omnibus of Joyce Carol Oates would fill more shelves than all of Shakespeare’s plays. A third meaning is something that covers a lot of different subjects at once, like an omnibus bill that has legislation about gun control, transportation, and parking meters.

Definitions of omnibus
  1. noun
    a vehicle carrying many passengers; used for public transport
    synonyms: autobus, bus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, passenger vehicle
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    a light bus (4 to 10 passengers)
    school bus
    a bus used to transport children to or from school
    trackless trolley, trolley coach, trolleybus
    a passenger bus with an electric motor that draws power from overhead wires
    type of:
    public transport
    conveyance for passengers or mail or freight
  2. noun
    an anthology of articles on a related subject or an anthology of the works of a single author
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    type of:
    a collection of selected literary passages
  3. adjective
    providing for many things at once
    “an omnibus law”
    comprehensive, overarching
    including all or everything
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