n. The act of alining; the act of laying out or regulating by a line; an adjusting to a line.n. The state of being so adjusted; the line of adjustment; especially, in military, the state of being in line: as, the alinement of a battalion; the alinement of a camp.n. In engineering: The ground-plan of a railway or other road, in distinction from the gradients or profile. The ground-plan of a fort or field-work.n. Also written allinement, alignment, alignement, allignment.n. In archaeology, megaliths arranged in single, parallel, or converging rows.