Venn diagram
（ plural ）
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(set theory) A diagram representing some sets by contours of closed shapes, such as circles or ellipses (and sometimes also the universal set as a rectangle enclosing all of these shapes), and indicating the relationships between the sets: by overlapping the shapes to show that the corresponding sets have a non-empty intersection, and by possibly (but not necessarily) enclosing all of the sets (which are proper subsets of the universal set) within a universal set (represented typically by a rectangle); such that the total number of simply connected regions is 2ⁿ, where n is the number of depicted sets which are proper subsets of the universal set.
Venn diagram
The teacher used a Venn diagram to explain how the three sets overlap and where their intersections occur.
The teacher used a Venn diagram to explain how the three sets overlap and where their intersections occur.
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