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English definition of “brainteaser”

brainteaser

noun [C]     /ˈbreɪnˌtiː.zər/ US  /-zɚ/ (also teaser)
a problem for which it is hard to find the answer, especially one which people enjoy trying to solve as a game: The paper publishes two brainteasers every Saturday.Difficult things and peoplePreventing and impeding
(Definition of brainteaser noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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