Learner's definition of DEVELOPMENT
1 [noncount] : the act or process of growing or causing something to grow or become larger or more advanced
— often + of
Good nutrition is important for proper muscle development.
efforts to promote economic development [=growth]
experts in child development
The company offers many opportunities for professional/personal/career development.
2 a : the act or process of creating something over a period of time — often + of b : the state of being created or made more advanced 3 [count] : something that has happened or has become known 4 a [count] : an area of land with buildings that were all built at around the same time b [noncount] : the process of building a group of houses or other buildings on an area of land 5 [noncount] : the chemical process by which photographic film is used to make a photograph