Definition of Venn diagram noun from the Oxford Advanced Learner's Dictionary

 

Venn diagram

 noun
noun
BrE BrE//ˈven daɪəɡræm//
 
; NAmE NAmE//ˈven daɪəɡræm//
 
(mathematics)
 
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a picture showing sets (= groups of things that have a shared quality) as circles that cross over each other, to show which qualities the different sets have in common Word Origin early 20th cent.: named after John Venn (1834–1923), English logician.
See the Oxford Advanced American Dictionary entry: Venn diagram