What does the root word "mono-" signify?

The root word "mono-" originates from the Greek word "monos," which means "one" or "single." This prefix is commonly used in various terms across different fields to indicate singularity or unity. For example, in the word "monologue," it refers to a speech given by one person. Similarly, in "monochrome," it implies a color scheme based on a single hue. The consistent theme in these usages illustrates that "mono-" unequivocally signifies the concept of one, establishing its role as a distinguishing marker for singular entities compared to terms that denote multiples or groups.