coevolution Syllabification: (co·ev·o·lu·tion)Pronunciation: /ˌkōevəˈlo͞oSHən, -ēvə-/Definition of coevolution noun Biology the influence of closely associated species on each other in their evolution. Derivatives coevolutionaryPronunciation: /-SHəˌnerē/ adjective coevolvePronunciation: /ˌkō-iˈvälv/ verb coevolution in other Oxford dictionaries Definition of coevolution in the British & World English dictionary