ceathair2, m. (gs. ~, pl. ~eanna). 1. Numeral: Four. (In counting) (Usually preceded by particle a. See a3)A ~, four. A ~ déag, fourteen. Fiche a ~, a ~ is fiche, twenty-four. Céad is a ~, one hundred and four. A ~ is a ~, four and four. A ~ a chlog, four o’clock. (A) ~ nó (a)cúig de bhlianta ó shin, four or five years ago. Uimhir, cuid, a ~, number, part, four. Eoin a C~, John the Fourth. 2. Dhá, trí, cheathair, two, three, fours. Faoi cheathair, four times, fourfold. 3. (Of figure, series) Scrios an ~, delete the (figure) four. An ~ muileata, the four of diamonds.