The document provides definitions and explanations of key terms and principles of design. It discusses the elements of design, including line, shape, value, texture, color, and space. It then covers principles of design such as unity and variety, balance, emphasis, contrast, proportion and scale, rhythm and movement. For each term or principle, it gives a concise definition or explanation of how it relates to and can be used in design. The document serves as a useful reference for understanding fundamental concepts in visual art and design.