Pronunciation: (ev"u-lOO'shun or, esp. Brit., ē"vu-),[key] —n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something evolved: The exploration of space is the evolution of decades of research. 3. Biol.change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift.
4. a process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
5. a motion incomplete in itself, but combining with coordinated motions to produce a single action, as in a machine.
6. a pattern formed by or as if by a series of movements: the evolutions of a figure skater. 7. an evolving or giving off of gas, heat, etc.
8. Math.the extraction of a root from a quantity. Cf. involution (def. 8).
9. a movement or one of a series of movements of troops, ships, etc., as for disposition in order of battle or in line on parade.
10. any similar movement, esp. in close order drill.