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Definitions

natural selection

[nach-er-uhl si-lek-shuhn, nach-ruhl] / ˈnætʃ ər əl sɪˈlɛk ʃən, ˈnætʃ rəl /
NOUN
evolutionary theory
Synonyms
WEAK
Darwinian theory Darwinism adaptation artificial selection biological evolution evolution evolutionism law of the jungle natural law phylogeny social Darwinism social evolution survival of the fittest theory of evolution

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It isn’t quite natural selection, but it isn’t far off.

From The Wall Street Journal • Jun. 6, 2026

Inside cells, many variations of DNA, RNA, and proteins arise, and natural selection favors the organisms that function most effectively.

From Science Daily • Mar. 9, 2026

That was assumed to be the result of a natural selection.

From Barron's • Feb. 26, 2026

The theoretical approach, which studies human behavior, cognition and emotions as products of natural selection, depicts relationship formation as sales-like, highly gendered and strategy-based.

From Los Angeles Times • Feb. 12, 2026

Joseph Hooker took the botany side of natural selection and showed how Charles’s theory seemed to work among plants.

From "Charles and Emma: The Darwins' Leap of Faith" by Deborah Heiligman

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