n. An expanded, usually green, organ of a plant, of transient duration, produced laterally from a stem or branch, and, with others, arranged upon the stem in a definite and symmetrical order.n. Anything resembling a leaf, as in being flat and relatively broad, or in being a flexible or movable attachment or addition to something else.n. A separately movable division of a folding or sliding door, fire-screen, table, hinge, etc.n. A very thin sheet of hammered metal; foil: as, gold- leaf.n. A portion of fat lying in a separate fold or layer; especially, the fat about the kidneys of a pig (compare leaf-lard); hence, in local use, the kidney itself.n. A tooth of a pinion, especially when the pinion is small.n. In architecture, an ornament resembling or representing a leaf of a plant; a foliation.n. A flap, as of a hat.n. In tapestry-weaving, one half the threads of the warp. As a preliminary to working a tapestry these leaves are separated, one being brought nearer the workman and the other left in the background.n. In zoology, a leaf-like part or organ. See noseleaf, and compare leaflet, 4.n. A distemper in young lambs caused by feeding on leavesTo shoot out leaves; produce foliage: as, the trees leaf in May. Also leave.n.