n. The act of binding or fastening with a cord or thong passed backward and forward through holes or around buttons or hooks.n. A method of fastening the adjoining ends of a belt by the use of a thong or lace.n. In bookbinding, the fastening of the boards of a book to its back by cords which pass around the sewed threads of the signatures and through holes pierced in the boards.n. A cord used in drawing tight or fastening; laces in general.n. Nautical, the cord or rope used to lace a sail to a gaff, yard, or boom, or to fasten two parts of a sail or an awning together.n. In ship-building, a piece of compass- or knee-timber fitted and bolted to the back of the figurehead and to its supporting piece, called the knee of the head. Also called lace-piece.n. In mining, same as lagging, 3.n. In the plumage of birds, especially in descriptions of standard or pure-bred poultry:n. A border or edging of a different color from the center, completely surrounding the web of a feathern. The coloration of plumage resulting from feathers marked as above, considered collectively.n. In mathematics, a complex of three or more closed bands, so that no two are interlinked, yet so that they cannot be separated without breaking.n. In structural work, particularly bridge work, the system of slender, diagonal members which connect the two opposite parallel members or flanges of a structural iron or steel beam, column, or strut. In lacing the several members form a single, continuous zigzag line, but do not cross one another as in latticing.