Webster's English Dictionary

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omnibus

1. om.ni.bus \'a:m-ni-(.)b*s\ n [F, fr. L, for all, dat. pl. of omnis all] 
   1: a usu. automotive public vehicle designed to carry a comparatively large 
    number of passengers : BUS 2: a book containing reprints of a number of 
   works 
2. omnibus aj : of, relating to, or providing for many things or classes at 
   once {an  ~ bill}