Definition of undergrowth noun from the Oxford Advanced American Dictionary

     

    undergrowth

     noun
    noun
    NAmE//ˈʌndərˌɡroʊθ//
     
    [uncountable]
     
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  1. 1a mass of bushes and plants that grow close together under trees in woods and forests synonym underbrush
  2. 2 They used their knives to clear a path through the dense undergrowth. The murder weapon was found concealed in undergrowth.
See the Oxford Advanced Learner's Dictionary entry: undergrowth