Battlement or parapet-wall: aluryt means ‘with a parapet’ or ‘battlemented.’ 2. Gutter, gallery, or passage behind a parapet at the top of a building. 3. Alura, or clerestory gallery (e.g. at Ely Cathedral). 4. Uppermost part of a wall on which the roof-structure rests. 5. Cloister walkway. 6. Highest part of a building.