ˌɛvəˈluːʃən
1
biology
a
: a theory that the differences between modern plants and animals are because of changes that happened by a natural process over a very long time
the theory of evolution
b
: the process by which changes in plants and animals happen over time
changes brought about by evolution
2
: a process of slow change and development
an important step in the evolution of computers
We have been able to watch her evolution [=growth] into a world-class runner.
Cite this Entry
“Evolution.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/evolution. Accessed 11 Jun. 2026.
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