in antiquity, a wall begun by the emperor Adrian, on the northern bounds of England, to prevent the incursions of the Picts and Scots. It was first made only of turf, strengthened with palliadoes, till the emperor Severus coming in person into Britain built it with solid stone. This wall, part of which still remains, begun at the entrance of Solway-frith in Cumberland, and running N. E. extended to the German ocean.