Omnibus

Parisian Omnibus, late Eighteenth / early nineteenth century

Omnibus is a Latin word meaning "for all (people)" and has several meanings in standard English:

bus, a vehicle for transporting large numbers of people
Omnibus, a law which covers many different subjects, or has had many unrelated additions tacked onto it.
omnibus (media), a book, video, or movie collecting two or more previous works by the same author, director, theme, or other unifying criterion
omnibus (broadcast), a compilation of daily episodes for some programs
omnibus (survey), a survey in which data on a wide variety of subjects is collected during the same interview
Omnibus (TV series), a broadcast program
Omnibus (album), an album by Decemberists singer/songwriter Colin Meloy's first band Tarkio.
Omnibus progression, a sequence of chords which effectively divides an octave into 4 equal parts.
Omnibus Press, a British publisher of books
Omnibus, a friend of Papa Smurf in the comic and cartoon The Smurfs
Omnibus, a vehicle of mass transit capable of visiting any physical or conceptual location - see The Magic School Bus.
The I/O bus used on certain PDP-8 computers manufactured by Digital Equipment Corporation.

Note

Omnibus had no plural in Latin, because it was already a plural word. In English, its plural is "omnibuses", not "omnibi", which is a solecism.