[lat-is] 
noun, verb, -ticed, -tic⋅ing.| 1. | a structure of crossed wooden or metal strips usually arranged to form a diagonal pattern of open spaces between the strips. |
| 2. | a window, gate, or the like consisting of such a structure. |
| 3. | Physics. the structure of fissionable and nonfissionable materials geometrically arranged within a nuclear reactor. |
| 4. | Also called Bravais lattice, crystal lattice, space lattice. Crystallography. 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. |
| 5. | Mathematics. a partially ordered set in which every subset containing exactly two elements has a greatest lower bound or intersection and a least upper bound or union. |
| 6. | to furnish with a lattice or latticework. |
| 7. | to form into or arrange like latticework. |
| lattice (lāt'ĭs) Pronunciation Key
A set of points that, when joined together, form the geometric shape of a mineral crystal. The lattice of the mineral halite, for example, is in the shape of a cube. See more at crystal. |
ɪs