English: Sketch is a rapidly executed freehand drawing that is not intended as a finished work, often consisting of a multitude of overlapping lines.

Various sketches

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Sketches compared to finished artwork

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Detailed sketch and finished woodcut of Albrecht Dürer's Ritter, Tod und Teufel 1513.

   
Winslow Homer - The Life Line (1884).

   
Jean-Auguste-Dominique Ingres - Madame Moitessier (1851).