<p><strong>Noun</strong></p><ul><li>a structure of crossed wooden or metal strips usually arranged to form a diagonal pattern of open spaces between the strips.</li><li>a window, gate, or the like consisting of such a structure.</li><li>the structure of fissionable and nonfissionable materials geometrically arranged within a nuclear reactor.</li><li>an arrangement in space of isolated points (lattice points) in a regular pattern, showing the positions of atoms, molecules, or ions in the structure of a crystal.</li><li>a partially ordered set in mathematics in which every subset containing exactly two elements has a greatest lower bound or intersection and a least upper bound or union.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) latticed, latticing.</li><li>to furnish with a lattice or latticework.</li><li>to form into or arrange like latticework.</li></ul>