Final answer:
A Bravais lattice is a mathematical arrangement of points in space that represents the underlying order of a crystalline solid. It describes the symmetry and arrangement of atoms in a crystal.
Step-by-step explanation:
A Bravais lattice is a mathematical arrangement of points in space that represents the underlying order of a crystalline solid. It can be thought of as an array of regularly spaced points that indicate the locations of the crystal's basic structural units. These repeating units build up the crystal lattice, much like a rubber stamp that can be pressed on paper to create a repeated pattern. In the context of crystallography, Bravais lattices are used to describe the symmetry and arrangement of atoms in a crystal.