|A process in which something passes by degrees to a different stage (especially a more advanced or mature stage).|
The development of his ideas took many years.
The evolution of Greek civilization.
The slow development of her skill as a writer.
|(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level.|
He proposed an indicator of osseous development in children.