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



BrE BrE//ˈeɪkɔːn//
; NAmE NAmE//ˈeɪkɔːrn//
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  • the small brown nut of the oak tree, that grows in a base shaped like a cup See related entries: Plants
  • Word OriginOld English æcern, of Germanic origin; related to Dutch aker, also to acre, later associated with oak and the plant corn.Idioms
    great/tall oaks from little acorns grow
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    (saying) something large and successful often begins in a very small way
    See the Oxford Advanced American Dictionary entry: acorn