Monochromatic refers to something that is composed or produced in a single color. This term can be used to describe images, light, sound, and even language. For example, an image that is taken using only one color filter would be considered monochromatic. Similarly, music that consists of notes played on a single instrument with no other accompaniment could also be described as monochromatic. The word "monochromatic" comes from the Greek words "mono," meaning single or alone, and "chroma," which means color.