evolution
US /ˌiː.vəˈluː.ʃən/
UK /ˌiː.vəˈluː.ʃən/
1.
the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
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The evolution of humans from apes is a widely accepted scientific theory.
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Darwin's theory of evolution revolutionized biology.
2.
the gradual development of something, especially from a simple to a more complex form.
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The evolution of the internet has changed how we communicate.
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We are witnessing the rapid evolution of technology.