bann Definitions (by source) Show all Poems on the O'Reillys (1) effort, action, deed, (2) a distance, extent. do chuaidh … bann suas tar, he excelled, 432 Poems on the O'Reillys. Editor: James Carney. The Book of O'Hara: Leabhar Í Eadhra (73, 96), b. isteach ót urchor aga 4341 n; beiridh b. 4175. The Book of O'Hara: Leabhar Í Eadhra. Editor: Lambert McKenna S.J.