third.1num.a. & s.(An) tríú (lá, ceann, duine, etc.). Third person, (i) Jur: treaspháirtí m; (ii) Gram: (an) tríú pearsa f. Edward the Third, Éadbhard a trí; an tríú hÉadbhard. (On) the third of March, (ar) an tríú lá de Mhárta. Rail: To travel third, taisteal sa tríú rang. 2s.aMus: Tréach m. bCom: Third of exchange, treasbhille m malairte. cAut: F: Treasghiar m, (an) tríú giar m. 3(Fractional) Trian m, treaschuid f, tríú (cuid f). ►thirdly, adv.Sa tríú háit, ar an tríú dul síos. And thirdly ..., agus a trí ...