Development is a noun that refers to the process of developing or being developed.
In different contexts, development can mean:
1. The process of growing or improving
2. A new event or stage in a changing situation
3. The process of making land available for new buildings
4. In photography, the chemical process of making a visible image
5. In music, the process of elaborating a theme
6. In chess, the process of moving pieces to more effective positions