sketch
n. countablen. a quick drawing that does not have many details. You use it to show the basic idea of what something looks like.
n. a rough or unfinished drawing or painting, often made to assist in making a more finished picture. Frequently used to describe a brief written or spoken outline of a plan.
He made a quick sketch of the park in his notebook.
The architect showed us a rough sketch of the house before creating the final digital plans.
Although the artist's final portraits are famous for their realism, her initial charcoal sketches often capture a raw energy that the polished oil paintings lack.
From Dutch schets or German Skizze, from Italian schizzo, from Latin schedium, from Ancient Greek σχέδιος (skhédios, “made suddenly, off-hand”), from σχεδόν (skhedón, “near, nearby”), from ἔχω (ékhō, “to hold”). Compare scheme.
Commonly takes the preposition 'of' when describing the subject matter.