evolutionism
US /ˌev.əˈluːʃən.ɪ.zəm/
UK /ˌev.əˈluːʃən.ɪ.zəm/
1.
evolucionismo
belief in the theory of evolution (= the natural process of living things changing and developing over millions of years):
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There are well-known debates over the religious implications of evolutionism.