大だい貨かMeanings1nounlarge truckAbbreviation of 大型貨物自動車. Used on street signs and in traffic regulations; not a general conversational term.See also: 貨物自動車この道どう路ろは大だい貨か通つう行こう止どめです。This road is closed to large trucks.標ひょう識しきに「大だい貨か」と書かいてある。The sign says 'large truck'.