## Definitions

### from The American Heritage® Dictionary of the English Language, 4th Edition

- n. A diagram using circles to represent sets, with the position and overlap of the circles indicating the relationships between the sets.

### from Wiktionary, Creative Commons Attribution/Share-Alike License

- n. 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 , where n is the number of depicted sets which are proper subsets of the universal set.

### from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

- n. a diagram that uses circles to represent mathematical or logical sets pictorially inside a rectangle (the universal set); elements that are common to more than one set are represented by intersections of the circles

## Etymologies

After John

(American Heritage® Dictionary of the English Language, Fourth Edition)*Venn*(1834-1923), British logician.Named after John Venn (1834–1923), British mathematician and philosopher. (Wiktionary)

## Examples

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## Comments

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