diagram - a drawing intended to explain how something works; a drawing showing the relation between the partsblock diagram - a diagram showing the interconnections between the components of system (especially an electronic system) drawing - a representation of forms or objects on a surface by means of lines; "drawings of abstract forms"; "he did complicated pen-and-ink drawings like medieval miniatures" horoscope - a diagram of the positions of the planets and signs of the zodiac at a particular time and place Venn diagram, Venn's diagram - a diagram that uses circles to represent set theory; the position and overlap of the circles indicate the relations among the sets zodiac - (astrology) a circular diagram representing the 12 zodiacal constellations and showing their signs |