A Bravais lattice is a mathematical concept used in crystallography to describe the arrangement of points in space that form a periodic structure. It consists of a set of discrete points that are arranged in a repeating pattern, which can represent the positions of atoms in a crystal. There are 14 distinct types of Bravais lattices in three-dimensional space, categorized based on their symmetry and dimensions. Each Bravais lattice can be defined by a set of vectors that describe the unit cell, the smallest repeating unit of the lattice. These lattices help in understanding the properties of materials, including their crystal structure, symmetry, and physical characteristics.