- Evolution is defined as the process of growth and development or the theory that organisms have grown and developed from past organisms.
- An example of evolution is how cell phones have changed over time.
- An example of evolution is the theory started by Charles Darwin that theorizes about how humans came to be in their present form.
evolution definition by Webster's New World
- an unfolding, opening out, or working out; process of development, as from a simple to a complex form, or of gradual, progressive change, as in a social and economic structure
- a result or product of this; thing evolved
- a movement that is part of a series or pattern
- a pattern produced, or seemingly produced, by such a series of movements: the evolutions of a fancy skater
- a setting free or giving off, as of gas in a chemical reaction
- the development of a species, organism, or organ from its original or primitive state to its present or specialized state; phylogeny or ontogeny
- Darwinian theory
- Math. the extracting of a root of a given number
Origin: Fr évolutionMil. any of various movements or maneuvers by which troops, ships, etc. change formation
Origin: Classical Latin evolutio, an unrolling or opening ; from evolutus, past participle of evolvere: see evolve
evolution definition by American Heritage Dictionary
- A gradual process in which something changes into a different and usually more complex or better form. See Synonyms at development.
- a. The process of developing.b. Gradual development.
- Biology a. Change in the genetic composition of a population during successive generations, as a result of natural selection acting on the genetic variation among individuals, and resulting in the development of new species.b. The historical development of a related group of organisms; phylogeny.
- A movement that is part of a set of ordered movements.
- Mathematics The extraction of a root of a quantity.
Origin: Latin ēvolūtiō, ēvolūtiōn-, from ēvolūtus, past participle of ēvolvere, to unroll; see evolve.
- evˌo·luˈtion·al, evˌo·luˈtion·arˌy adjective
- evˌo·luˈtion·arˌi·ly adverb
evolution - Ologies & -Isms Definition
evolution - Cultural Definition
A theory first proposed in the nineteenth century by Charles Darwin, according to which the Earth's species have changed and diversified through time under the influence of natural selection. Life on Earth is thought to have evolved in three stages. First came chemical evolution, in which organic molecules (see also organic molecule) were formed. This was followed by the development of single cells capable of reproducing themselves. This stage led to the development of complex organisms capable of sexual reproduction. Evolution is generally accepted as fact by scientists today, although debates continue over the precise mechanisms involved in the process. (See mutation, punctuated equilibrium, and creation science.)
- The first cell is thought to have been formed when the Earth was less than a billion years old.
evolution - Medical Definition
- A continuing process of change from one state or condition to another or from one form to another.
- The theory that groups of organisms change with passage of time, mainly as a result of natural selection, so that descendants differ morphologically and physiologically from their ancestors.
evolution - Science Definition
- The process by which species of organisms arise from earlier life forms and undergo change over time through natural selection . The modern understanding of the origins of species is based on the theories of Charles Darwin combined with a modern knowledge of genetics based on the work of Gregor Mendel. Darwin observed there is a certain amount of variation of traits or characteristics among the different individuals belonging to a population. Some of these traits confer fitness—they allow the individual organism that possesses them to survive in their environment better than other individuals who do not possess them and to leave more offspring. The offspring then inherit the beneficial traits, and over time the adaptive trait spreads through the population. In twentieth century, the development of the the science of genetics helped explain the origin of the variation of the traits between individual organisms and the way in which they are passed from generation to generation. This basic model of evolution has since been further refined, and the role of genetic drift and sexual selection in the evolution of populations has been recognized. See also natural selection, sexual selection. See Notes at adaptation, Darwin.
- A process of development and change from one state to another, as of the universe in its development through time.