English

Definition of Mensa from the Oxford Advanced Learner's Dictionary

 

Mensa

 
BrE
 
; NAmE
 
Mensa International
 
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a social organization for highly intelligent people. Established in Britain in 1946, it became an international organization in the 1960s. It is based on the idea that intelligence can be accurately measured by tests and only people who achieve very high scores in intelligence tests are allowed to join.
See the Oxford Advanced American Dictionary entry: Mensa