Definition of "jungle" []

• Land densely overgrown with tropical vegetation. (noun)
• A dense thicket or growth. (noun)
• A dense, confused mass; a jumble. (noun)
• Something made up of many confused elements; a bewildering complex or maze: sorting through the jungle of regulations. (noun)
• A place or milieu characterized by intense, often ruthless competition or struggle for survival: the corporate jungle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A growing cadre of integrative medicine professionals recognizes the acronym jungle of the emerging ACOs (Accountable Care Organizations) and PCMHs (Patient Centered Medical Homes) as a fertile host for mushrooming use of integrative care."
• "All you need in the jungle is a pair of jeans and a pair of khaki's (at the top of the continental divide, even at 9 degrees over equator is usually too cold for shorts and a teeshirt), rubber boots, a fllece top and a rain poncho."
• "For the rule of the jungle is first fear, and then hunger and thirst."