A sketch is a simple, rough drawing or outline of something, usually done with a pencil or pen. It is a way of quickly capturing an idea or concept visually without much detail. Full definition
Most of them are based on observational notes, beginnings of sketches of objects or spaces. (twocoatsofpaint.com)
Long stretches of this four - hour film simply observe a painter at work on a series of sketches in preparation for the completion of his long - abandoned masterpiece. (nextprojection.com)
I came to appreciate these drawings not as sketches for paintings, but for the quality of monochromatic grey and black and for the role stroke played in building up masses. (jacktworkov.com)