a metal screen, to enclose or protect any particular spot, locality, shrine, tomb, or sacred ornament; (2) a gate of metal enclosing or protecting the entrance of a religious house or sacred building; (3) the wicket of a monastery; (4) a small screen of iron bars inserted in the door of a monastic or conventual building, in order to allow the inmates to converse with visitors, or to answer inquiries without opening the door.