Generation is a noun that refers to:
1. All of the people born and living at about the same time, regarded collectively
2. The average period, generally considered to be about thirty years, in which children are born and grow up, become adults, and begin to have children of their own
3. A set of members of a family regarded as a single step or stage in descent
4. The production or creation of something
5. In technology, a stage in the development of a product or system