: descent with modification from preexisting species : cumulative inherited change in a population of organisms through time leading to the appearance of new forms : the process by which new species or populations of living things develop from preexisting forms through successive generations
Evolution is a process of continuous branching and diversification from common trunks. This pattern of irreversible separation gives life's history its basic directionality. Stephen Jay Gould
also: the scientific theory explaining the appearance of new species and varieties through the action of various biological mechanisms (such as natural selection, genetic mutation or drift, and hybridization)
Since 1950, developments in molecular biology have had a growing influence on the theory of evolution. Nature
In Darwinian evolution, the basic mechanism is genetic mutation, followed by selection of the organisms most likely to survive. Pamela Weintraub
b
: the historical development of a biological group (such as a species) : phylogeny
2
a
: a process of change in a certain direction : unfolding
b
: the action or an instance of forming and giving something off : emission
c(1)
: a process of continuous change from a lower, simpler, or worse to a higher, more complex, or better state : growth
(2)
: a process of gradual and relatively peaceful social, political, and economic advance
changes brought about by evolution an important step in the evolution of computers
Recent Examples on the WebWith more and more directors and actors moving increasingly from film to television, Unifrance’s new role is a natural evolution that reflects that development, said Unifrance vice president Hervé Michel. Ed Meza, Variety, 4 Sep. 2022 The intention is to, if anything, expose where there could be growth and expansion in thinking, where there could be evolution. Quinci Legardye, Harper's BAZAAR, 1 Sep. 2022 The result is less an evolution of a two-wheeled machine than a pastiche of the many things such a device represents. Ian Bogost, The Atlantic, 31 Aug. 2022 So, yes, there are two bands divided between the East and West coasts, an evolution from TSO’s first tour of seven cities in 1999. Melissa Ruggieri, USA TODAY, 30 Aug. 2022 According to Rockmore, one of the most creative trends for fall is the evolution of the crisp white shirt.Town & Country, 22 Aug. 2022 Lime and salt are a gateway to michelada culture, and a crucial element to the story of the beer cocktail’s evolution across many places at once.Los Angeles Times, 14 Aug. 2022 This appears to be convergent evolution, Lautenschlager says, where the different species independently evolved away from round eyes. Fionna M. D. Samuels, Scientific American, 11 Aug. 2022 First is the evolution of game engines and console generations. Frederick Daso, Forbes, 9 Aug. 2022 See More
Word History
Etymology
borrowed from New Latin ēvolūtiōn-, ēvolūtiō "unfolding of a curve (in geometry), emergence from an enclosing structure, historical development," going back to Medieval Latin, "unfolding of a tale, lapse of time," going back to Latin, "unrolling of a papyrus scroll while reading it," from ēvolū-, variant stem of ēvolvere "to roll out or away, unwind, unroll" + -tiōn-, -tiō, suffix of verbal action — more at evolve