Russell's paradox

noun
Rus·​sell's paradox | \ˈrəsəlz-\

Definition of Russell's paradox 

: a paradox that discloses itself in forming a class of all classes that are not members of themselves and in observing that the question of whether it is true or false if this class is a member of itself can be answered both ways — compare liar paradox, vicious circle principle

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First Known Use of Russell's paradox

1904, in the meaning defined above

History and Etymology for Russell's paradox

after Bertrand Russell

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The first known use of Russell's paradox was in 1904

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