n. plural Reins.n. A woven material, especially one woven without pile, plainly and strongly.n. In printing, the broad tapes used to conduct webs or sheets of paper in a printing-machine, or the broad straps or girths attached to the rounce of the hand-press.n. In zoology, the webs of the digits collectively: as, the webbing is extensive or complete; the webbed state of the digits, or the formation of their webs; palmation. See web, n., 10.