bosom.1s.aBrollach m, cliabh m, ucht m. She hid the letter in her bosom, d'fholaigh sí an litir ina hochras. The wife of his bosom, a chéile cléibh. bIn the bosom of his family, i gceartlár a theaghlaigh. cBosom of a dress, brollach gúna. 2a.Bosom friend, cara m cléibh.