Alur

(Old Eng. alours). This word appears generally to have signified the gutter, passage, or gallery in which persons could walk behind a parapet on the top of a wall, or in other situations, especially in military architecture, where the alur becomes of the highest importance. The term, however, was sometimes used for passages of various kinds. Lydgate used the word for covered walks in the streets. So in the form alure it signifies an alley or walk in a church or cloister. SEE AMBULATORY.