- 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
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- 2[singular] jungle (of something) a confusing, complicated, or messy mixture of things synonym tangle a jungle of weeds. a jungle of wires
- 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 concrete jungle Idioms
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.
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