That which confines or contracts; a restraint; a shackle; a hindrance., A device, usually of iron bent at the ends, used to hold together blocks of stone, timbers, etc.; a cramp iron., A rectangular frame, with a tightening screw, used for compressing the joints of framework, etc., A piece of wood having a curve corresponding to that of the upper part of the instep, on which the upper leather of a boot is stretched to give it the requisite shape., A spasmodic and painful involuntary contraction of a muscle or muscles, as of the leg., To compress; to restrain from free action; to confine and contract; to hinder., To fasten or hold with, or as with, a cramp., to bind together; to unite., To form on a cramp; as, to cramp boot legs., To afflict with cramp., Knotty; difficult.