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WordReference Random House Learner's Dictionary of American English © 2024ev•o•lu•tion /ˌɛvəˈluʃən; esp. Brit. ˌivə-/USA pronunciation n. [uncountable]- any process of formation or growth;
development: the evolution of the drama. - BiologyBiol.
- change in a population of living things by such processes as mutation and natural selection.
- the theory that all existing organisms developed from earlier forms by natural selection.
ev•o•lu•tion•ar•y, adj. WordReference Random House Unabridged Dictionary of American English © 2024ev•o•lu•tion (ev′ə lo̅o̅′shən or, esp. Brit., ē′və-),USA pronunciation n. - any process of formation or growth;
development:the evolution of a language; the evolution of the airplane. - a product of such development;
something evolved:The exploration of space is the evolution of decades of research. - Biologychange in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift.
- Sociologya process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
- a motion incomplete in itself, but combining with coordinated motions to produce a single action, as in a machine.
- a pattern formed by or as if by a series of movements:the evolutions of a figure skater.
- Thermodynamicsan evolving or giving off of gas, heat, etc.
- Mathematicsthe extraction of a root from a quantity. Cf. involution (def. 8).
- Militarya movement or one of a series of movements of troops, ships, etc., as for disposition in order of battle or in line on parade.
- Militaryany similar movement, esp. in close order drill.
- Latin ēvolūtiōn- (stem of ēvolūtiō) an unrolling, opening, equivalent. to ēvolūt(us) (see evolute) + -iōn- -ion
- 1615–25
- 1.See corresponding entry in Unabridged unfolding, change, progression, metamorphosis.
- 1.See corresponding entry in Unabridged stasis, inactivity, changelessness.
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