n. A hanging screen of a textile fabric (or rarely of leather) used to close an opening, as a doorway or an alcove, to shut out the light from a window, and for similar purposes. See blind, shade, portière, lambrequin; also altar-curtain and hanging.n. Hangings used to shut in or screen a bedstead.n. Hence Whatever covers or conceals like a curtain or hangings.n. One of the movable pieces of canvas or other material forming a tent.n. In fortification, that part of a rampart which is between the flanks of two bastions or between two towers or gates, and bordered with a parapet, behind which the soldiers stand to fire on the covered way and into the moat. See cuts under bastion and crown-work.n. An ensign or flag.n. In mycology, same as cortina.n. A plate in a lock designed to fall over the keyhole as a mask to prevent tampering with the lock.n. The leaden plate which divides into compartments the large leaden chamber in which sulphuric acid is produced by the oxidation of sulphurous compounds in the ordinary process of manufacture.To inclose with or as with curtains; furnish or provide with curtains.n. In hydraul. engm., a woven fabric of brushwood or withes, such as branches of willows, placed in a stream to retard the current and permit the deposition of silt, or to compel scour and remove it.n. A vertical fold of the mantle within the margins of the valves of certain pelecypods (the pectens).n. In architecture, a wall which serves as an inclosure rather than as a support. Thus the wall beneath a large window, as in a church, or that between two buttresses which carry the vault and roof without its assistance, is a curtain.