This document discusses definitions of art and approaches to defining art. It addresses the functions of art within cultures, the visual form and materials used, the ideas and content communicated, and cultural definitions of beauty. Art is defined as a primarily visual medium that expresses human experience and the world. The functions of art include assisting in rituals, reflecting customs, communicating ideas, educating people, commemorating events, and entertainment. Ideas of beauty change over time and cultures, and are subjective. The document also covers categories of visual arts, styles of art like naturalism and abstraction, and how the artist Vincent Van Gogh used swirling brush strokes and moody content in his self portraits and Starry Night painting.