struggle existence

struggle for existence

noun
the competition in nature among organisms of a population to maintain themselves in a given environment and to survive to reproduce others of their kind.

Origin:
1820–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
struggle for existence
 
n
(not in technical usage) See also natural selection competition between organisms of a population, esp as a factor in the evolution of plants and animals

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