Expressionism was an art movement in the early 20th century where artists prioritized expressing emotions over realistic depictions. Expressionist artists used exaggerated colors and brush strokes to convey strong feelings. Key features included using irrational and supernatural elements to depict individual alienation from society and nature. Edvard Munch was a famous Norwegian Expressionist painter known for works like The Scream which portrayed feelings of anxiety and isolation through distorted figures and landscapes.