Rhombus/ˈrɑːmbəs/ Definition 1 of 1Pro Tip 1/3Not Always Tilted A rhombus can be both a diamond shape and stand upright, as squares do. Many shapes on the wallpaper are upright rhombuses. Pro Tip 2/3In Geometry The term 'rhombus' is often used in geometry classes and mathematical contexts. Draw a rhombus with each side measuring 5cm. Pro Tip 3/3Visual Symbolism The shape can symbolize balance and equal forces, since its sides are of equal length. The company logo's rhombus represents stability.