What does the 'stroke' refer to in vector graphics?

In vector graphics, the term 'stroke' specifically refers to the outline or border of a shape. It is the visual line that defines the edges and contours of a shape, and it can vary in width, color, and style (such as solid, dashed, or dotted). The stroke is crucial for creating the overall appearance of vector illustrations, as it helps to distinguish shapes from one another and adds visual interest to the design.

The concept of a stroke is fundamental to vector graphics because it is resolution-independent, meaning it can be resized without losing quality. This characteristic is essential for artistic flexibility in various media. In contrast, options referring to color or fill pertain to the interior aspects of a shape or the surface texture, which are not related to the concept of a stroke. Thus, understanding the distinction between stroke and fill is vital for anyone working with vector graphic design.