roughdiagram
nounUK /rʌf ˈdaɪəɡræm/
US /rʌf ˈdaɪəɡræm/
A quick, simple drawing that shows the main idea.
She drew a rough diagram of the treehouse on a napkin.
OTHER MEANINGS
2. A first, unfinished drawing used to plan something.
The engineer made a rough diagram before building the model.
3. A simple picture that helps explain how something works.
The teacher used a rough diagram to show the water cycle.
4. A messy but useful sketch made in a hurry.
His rough diagram of the maze helped us find the way out.