form

In art, a three-dimensional shape or object, and one of the formal art elements. The form of a subject can be recreated using contour lines, shading, cross-hatching, and highlights. If a drawing ‘lacks form’, it means that an image is flat and two-dimensional to look at. Form has height, width, and depth, and may be organic, such as a cloud, or geometric, such as a pyramid or cylinder. Organic forms suggest naturalism, while geometric forms often convey artificiality.

In art, shape (a defined area of two-dimensions) and form are closely linked; for example one side of a cubed form is a square shape.