Albion, ancient (Celtic or pre-Celtic) name for the largest of the British Isles, first recorded in the 1st cent. ce, by when it had been superseded (among Romans) by ‘Britannia’: ps.-Arist.Mund. 393b12 (50 bce–ce 100?); Pliny, HN 4. 102. A reference to Albiones, an island-people two days' coasting from the tin-isles of the Oestrymnides in the Sea Coast of *Avianus (4th cent.