WordReference Random House Unabridged Dictionary of American English © 2026
co•ev•o•lu•tion
(kō′ev ə lo̅o̅′shən or, esp. Brit., -ē və-),USA pronunciation n.
co′ev•o•lu′tion•ar•y, adj.
- Biologyevolution involving a series of reciprocal changes in two or more noninterbreeding populations that have a close ecological relationship and act as agents of natural selection for each other, as the succession of adaptations of a predator for pursuing and of its prey for fleeing or evading.
- co- + evolution 1960–65
'coevolution' also found in these entries (note: many are not synonyms or translations):