[{"Bold_text": "noun", "List Items": ["a figure, usually consisting of a line drawing, made to accompany and illustrate a geometrical theorem, mathematical demonstration, etc.", "a drawing or plan that outlines and explains the parts, operation, etc., of something:a diagram of an engine.", "a chart, plan, or scheme."]}, {"Bold_text": "verb (used with object)", "List Items": ["to represent by a diagram; make a diagram of."]}]