English

Definition of brain-teaser noun from the Oxford Advanced Learner's Dictionary

 

brain-teaser

 noun
noun
BrE BrE//ˈbreɪn tiːzə(r)//
 
; NAmE NAmE//ˈbreɪn tiːzər//
 
 
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a problem that is difficult but fun to solve There were some real brain-teasers in the quiz.
See the Oxford Advanced American Dictionary entry: brain-teaser