The Collaborative International Dictionary of English v.0.48:

Lattice \Lat"tice\, v. i. [imp. & p. p. Latticed; p. pr. & vb.
   n. Latticing.]
   1. To make a lattice of; as, to lattice timbers.
      [1913 Webster]

   2. To close, as an opening, with latticework; to furnish with
      a lattice; as, to lattice a window.
      [1913 Webster]

   To lattice up, to cover or inclose with a lattice.
      [1913 Webster]

            Therein it seemeth he [Alexander] hath latticed up
            Caesar.                               --Sir T.
                                                  North.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lattice \Lat"tice\, n. [OE. latis, F. lattis lathwork, fr. latte
   lath. See Latten, 1st Lath.]
   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.
      [1913 Webster]

            The mother of Sisera looked out at a window, and
            cried through the lattice.            --Judg. v. 28.
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   2. (Her.) The representation of a piece of latticework used
      as a bearing, the bands being vertical and horizontal.
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   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.
      [PJC]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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

The Free On-line Dictionary of Computing (19 January 2023):

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.

   (1999-12-09)