A barrow is essentially a burial mound, typically prehistoric in origin, raised over the remains of the dead and sometimes containing cremated bone, grave goods, or secondary burials added centuries after the original interment. They range from modest earthen rises that a casual walker might dismiss as a natural hummock, to more elaborate constructions that clearly announce themselves as the deliberate work of human hands.

Carrowneden itself is a small rural townland in Mayo, a county that holds a remarkable density of prehistoric activity, from megalithic tombs to ritual enclosures, many of them poorly documented or known only in outline. Barrows of this kind were often sited with some care, placed on ridgelines or at the edges of cultivated ground, where they would remain visible to the living while marking territory or commemorating ancestry. Without more detailed field records it is not possible to say with confidence what form this particular example takes, whether it is a bowl barrow, a ring barrow, or something more eroded and ambiguous, but its presence in the record places it within a tradition of funerary monument-building that stretches back several thousand years in Ireland.