/evəˈlo͞oSH(ə)n/

noun

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.

synonyms:

Darwinism, natural selection

“early ecologists were not interested in evolution”

the gradual development of something, especially from a simple to a more complex form.

“the forms of written languages undergo constant evolution”

synonyms:

development, advancement, growth, rise, progress, progression, expansion, extension, unfolding;

 Ongoing movement into a more complex form