n. A part cut off or marked as separate from others; one of the parts into which a body naturally divides itself; a section: as, the segments of a calyx; the segments of an orange; the segments of a leaf.n. In geometry, a part cut off from any figure by a line or plane.n. In heraldry, a bearing representing one part only of a rounded object, as a coronet or wreath: usually a piece less than half of the circle.To divide or become divided or split up into segments.To separate or divide into segments: as, a segmented cell.n. An element of a machine, such as a toothed wheel, cam, or pulley, the active surface of which is not a full surface of revolution, but only a segment or part of such surface.