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Definition of acorn noun from the Oxford Advanced American Dictionary

 

acorn

 noun
noun
NAmE//ˈeɪkɔrn//
 
 
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  • the small brown nut of the oak tree, which grows in a base shaped like a cup
    • Idioms
    great/tall oaks from little acorns grow (saying)
     
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    something large and successful often begins in a very small way
    See acorn in the Oxford Advanced Learner's Dictionary
    Check pronunciation: acorn

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