Home › Words › M › midibusmidibusmidibus · noun — A single-decker bus, generally smaller than a traditional bus but larger than a minibus.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom mid- + minibus.nounA single-decker bus, generally smaller than a traditional bus but larger than a minibus.Definitions & examples from Wiktionary (CC BY-SA 3.0).