Dar‧win‧is‧m /ˈdɑːwənɪzəm, ˈdɑːwɪnɪzəm $ ˈdɑːr-/ noun [uncountable]
the Theory of Evolution, the idea that plants and animals develop gradually from simpler to more complicated forms by natural selection, which is the process by which only plants and animals that are naturally suitable for life in their environment will continue to live, while all others will die

[TahlilGaran] Dictionary of Contemporary English ▲