evolution - definition and synonyms

 
 
noun [uncountable] 

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/ˌiːvəˈluːʃ(ə)n/
  1. 1
    the scientific theory according to which types of plant and animal change gradually over long periods of time through a process known as natural selection to become more suitable for their environment

    The new fossil finds may tell us more about human evolution.

  2. 2
    the way in which something gradually changes and develops
    evolution of:

    the evolution of language