Lattice

n.	1.	Any work of wood, metal, plastic, or other solid material, made by crossing a series of parallel laths, or thin strips, with another series at a diagonal angle, and forming a network with openings between the strips; as, the lattice of a window; - called also latticework. The mother of Sisera looked out at a window, and cried through the lattice. - Judg. v. 28.
	2.	(Her.) The representation of a piece of latticework used as a bearing, the bands being vertical and horizontal.
	3.	(Crystallography) The arrangement of atoms or molecules in a crystal, represented as a repeating arrangement of points in space, each point representing the location of an atom or molecule; called also crystal lattice and space lattice. Lattice bridge a bridge supported by lattice girders, or latticework trusses. Lattice girder (Arch.) a girder of which the wed consists of diagonal pieces crossing each other in the manner of latticework. Lattice plant (Bot.) an aquatic plant of Madagascar (Ouvirandra fenestralis), whose leaves have interstices between their ribs and cross veins, so as to resemble latticework. A second species is Ouvirandra Berneriana. The genus is merged in Aponogeton by recent authors.
v. i.	1.	To make a lattice of; as, to lattice timbers. [imp. & p. p. Latticed ; p. pr. & vb. n. Latticing .]
	2.	To close, as an opening, with latticework; to furnish with a lattice; as, to lattice a window. To lattice up to cover or inclose with a lattice. Therein it seemeth he [Alexander] hath latticed up Cæsar. - Sir T. North.

Noun	1.	lattice - an arrangement of points or particles or objects in a regular periodic pattern in 2 or 3 dimensions
	2.	lattice - small opening (like a window in a door) through which business can be transacted Synonyms: grille, wicket
	3.	lattice - framework consisting of an ornamental design made of strips of wood or metal Synonyms: fretwork, latticework

(theory)

lattice - A partially ordered set in which all finite subsets have a least upper bound and greatest lower bound. This definition has been standard at least since the 1930s and probably since Dedekind worked on lattice theory in the 19th century; though he may not have used that name. See also complete lattice, domain theory.

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