Definition of evolution:
“In the broadest sense, evolution is merely change, and so is all-pervasive; galaxies, languages, and political systems all evolve. Biological evolution … is change in the properties of populations of organisms that transcend the lifetime of a single individual. The ontogeny of an individual is not considered evolution; individual organisms do not evolve. The changes in populations that are considered evolutionary are those that are inheritable via the genetic material from one generation to the next. Biological evolution may be slight or substantial; it embraces everything from slight changes in the proportion of different alleles within a population (such as those determining blood types) to the successive alterations that led from the earliest protoorganism to snails, bees, giraffes, and dandelions.”
- Douglas J. Futuyma in Evolutionary Biology, Sinauer Associates 1986
Definition of ev·o·lu·tion:
- biology: theory of development from earlier forms: the theoretical process by which all species develop from earlier forms of life. According to this theory, natural variation in the genetic material of a population favors reproduction by some individuals more than others, so that over the generations all members of the population come to possess the favorable traits.
- biology: developmental process: the natural or artificially induced process by which new and different organisms develop as a result of changes in genetic material;
- gradual development: the gradual development of something into a more complex or better form;
“the evolution of democracy in Western Europe”
- pattern caused by movement: a pattern formed by a series of movements;
- physics: giving off heat or gas: the emission of heat, gas, or vapor;
- mathematics: finding root of number: an algebraic operation in which the root, e.g. the square root or cube root, of a number is found.
See also involution (sense 6)
- military military exercise: a military exercise or maneuver carried out according to a plan.
Synonyms: development, fruition, growth, progress, progression, advancement.
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