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

n a vehicle carrying many passengers; used for public transport

autobus, bus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, passenger vehicle
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

n an anthology of articles on a related subject or an anthology of the works of a single author

Type of:
a collection of selected literary passages

adj providing for many things at once

“an omnibus law”
comprehensive, overarching
including all or everything

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