What is a good def of line (for art)

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In art, a line is defined as a distinct, elongated mark or stroke made by a tool or instrument on a surface. It has both length and direction, and can vary in thickness, texture, and style. Lines can be straight or curved, and they serve various purposes, such as creating shapes, guiding the viewer's eye, conveying movement, and expressing emotions. Lines can also define the boundaries of forms and contribute to the overall composition of an artwork.