A trellis pattern is a type of design that consists of an interwoven LATTICE of lines or shapes. It is often used in architecture, art, and interior design to create a decorative effect. The term 'trellis pattern' comes from the French word treillis, which means 'LATTICE.' The LATTICE pattern is created by intersecting vertical and horizontal lines, creating a grid-like structure. This pattern can be used to create a variety of designs, from simple geometric shapes to more complex patterns.