WordReference Random House Unabridged Dictionary of American English © 2026
mac•ro•ev•o•lu•tion
(mak′rō ev′ə lo̅o̅′shən or, esp. Brit., -ē′və-),USA pronunciation n. [Biol.]
mac′ro•ev′o•lu′tion•ar′y, adj.
- Biologymajor evolutionary transition from one type of organism to another occurring at the level of the species and higher taxa.
- macro- + evolution 1935–40
'macroevolution' also found in these entries (note: many are not synonyms or translations):