Definition of jungle noun from the Oxford Advanced American Dictionary

     

    jungle

     noun
    noun
    NAmE//ˈdʒʌŋɡl//
     
     
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  1. 1 [uncountable, countable] an area of tropical forest where trees and plants grow very thickly The area was covered in dense jungle. the jungles of southeast Asia jungle warfare
  2. 2[singular] jungle (of something) a confusing, complicated, or messy mixture of things synonym tangle a jungle of weeds. a jungle of wires
  3. 3[singular] an unfriendly or dangerous place or situation, especially one where it is very difficult to be successful or to trust anyone It's a jungle out there—you've got to be strong to succeed. see also concrete jungle
  4. Idioms
    the law of the jungle
     
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    a situation in which people are prepared to harm other people in order to succeed These criminal gangs only recognize the law of the jungle.
See the Oxford Advanced Learner's Dictionary entry: jungle