treas1, m. (gs. & npl. ~a, gpl. ~). Line, file. Bhí siad ag máirseáil ina dtreasa, they were marching in files. ~ singil, single file.
treas2, m. (gs. & npl. ~a, gpl. ~). Combat, battle. Dian i d~, fierce in fray. ~ a thabhairt (do), to give battle (to). Thug sé ~ orthu, he made an attack on them. Ná cuir ~ ar do chairde, don’t make war on your friends. Tá sé chun ~a leat, he is a match for you.
treas3, num. a. (In gs. either nom. or gen. of article & accompanying noun may be used)Third. An ~ duine, the third person. I gceann an ~ lá, an ~ lae, at the end of the third day. B’fhéidir nach dtógfadh an ~ fear an meáchan sin, perhaps there aren’t three men who could lift that weight.