(jungles)
1.
A jungle is a forest in a tropical country where large numbers of tall trees and plants grow very close together.
...the mountains and jungles of Papua New Guinea...
The mountain area is covered entirely in dense jungle.
N-VAR
2.
If you describe a place as a jungle, you are emphasizing that it is full of lots of things and very untidy.
...a jungle of stuffed birds, knick-knacks, potted plants.
N-SING: with supp [emphasis]
3.
If you describe a situation as a jungle, you dislike it because it is complicated and difficult to get what you want from it.
Social security law and procedure remain a jungle of complex rules.
N-SING: with supp [disapproval]
4.
If you refer to the law of the jungle, you are referring to a situation in which there are no laws or rules to govern the way that people behave and people use force to get what they want.
If you make aggression pay, this becomes the law of the jungle...
PHRASE [disapproval]