Definition of superfood noun from the Oxford Advanced Learner's Dictionary

 

superfood

 noun
noun
BrE BrE//ˈsuːpəfuːd//
 
, BrE//ˈsjuːpəfuːd//
 
; NAmE NAmE//ˈsuːpərfuːd//
 
 
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a type of food that some people think is very good for you and helps to prevent disease the health benefits of so-called superfoods Pomegranates and blueberries are marketed as superfoods.
See the Oxford Advanced American Dictionary entry: superfood