generation

1. The act of creating something or bringing something into being; production, creation. (countable, uncountable)
2. The act of creating a living creature or organism; procreation. (countable, uncountable)
3. A single step or stage in the succession of natural descent; a rank or degree in genealogy, the members of a family from the same parents, considered as a single unit. (countable, uncountable)
4. The average amount of time needed for children to grow up and have children of their own, generally considered to be a period of around thirty years, used as a measure of time. (countable, uncountable)
5. A set stage in the development of computing or of a specific technology. (countable, uncountable)
6. The formation or production of any geometrical magnitude, as a line, a surface, a solid, by the motion, in accordance with a mathematical law, of a point or a magnitude, by the motion of a point, of a surface by a line, a sphere by a semicircle, etc. (countable, uncountable) · the generation of a line or curve
7. A group of people born in a specific range of years and whose members can relate culturally to one another. (countable, uncountable) · Generation X grew up in the eighties, whereas the generation known as the millennials grew up in the nineties.
8. A version of a form of pop culture which differs from later or earlier versions. (countable, uncountable) · People sometimes dispute which generation of Star Trek is best, including the original and The Next Generation.

Plural generations