cairthe, coirthe Definitions (by source) Show all Poems on the O'Reillys a pillarstone. cairthe nach cumhsgaighthir, 1065 Poems on the O'Reillys. Editor: James Carney. Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death m., rock, 3768 Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.