BREP stands for Boundary Representation, which is a widely used method in computer-aided design and 3D modeling. Synonyms for BREP include solid modeling, surface modeling, or parametric modeling. Solid modeling refers to the creation of three-dimensional objects by combining and manipulating basic geometric shapes such as cubes, spheres, and cones. Surface modeling involves the creation of three-dimensional surfaces by defining their boundaries through curves and surfaces. Parametric modeling involves designing objects by defining the properties and relationships of their constituent parts. These synonyms all describe the process of representing 3D objects in a computer program in order to create a digital model.