1. An open framework made of strips of metal, wood, or similar material overlapped or overlaid in a regular, usually crisscross pattern. 2. A structure, such as a window, screen, or trellis, made of or containing such a framework. 3. Something, such as a decorative motif or heraldic bearing, that resembles an open, patterned framework. 4. A regular, periodic configuration of points, particles, or objects throughout an area or a space, especially the arrangement of ions or molecules in a crystalline solid. 5. The spatial arrangement of fissionable and nonfissionable materials in a nuclear reactor. 6. To construct or furnish with a lattice or latticework.
