Rian daingneachaidh a-rèir crìch nàdarra gus muinntir an àite a dhìon agus creachadairean a chumail air falbh, m.e. Balla Antoninus. Cleachd seòrsa nas mionaidiche de chuimhneachan ma tha fios air. [gd]
A system of fortifications constructed along a national frontier to contain the local population, as well as keep out undesirable raiders eg. Antonine Wall. Use with more specific monument type where known.
