minibus /ˈmɪ.ni.bəs/ noun4 •A small bus, especially one used as transport for small groups. •(South-Africa) A sixteen-seater vehicle used as a taxi.Police are still searching for the gunmen who hijacked the minibus carrying school pupils taking two of the children with them. — 2006 •(US) A combined spending bill for multiple departments that is smaller than an omnibus bill.The minibus is the first of two funding packages the House hopes to pass this month. — 2020 •(historical) A small four-wheeled carriage. formsminibuses · minibusses