Refract/rɪˈfrækt/ Definition 1 of 2Pro Tip 1/3Medium Change Refract is used when light crosses boundaries like air to water, altering its course. The straw seems bent where it refracts at the water's surface. Pro Tip 2/3Natural Phenomena Use 'refract' to explain why we see beautiful patterns like rainbows in nature. The droplets in the atmosphere refract sunlight to create a rainbow. Pro Tip 3/3Not Reflection 'Refract' isn't the same as 'reflect.' It's about bending within, not bouncing back. The light doesn't reflect off the water, it refracts within it.