generation

ot noun

1. 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. This is the book of the generations of Adam - Genesis 5:1
2. 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. the generation of a line or curve
3. A specific age range whose members can relate culturally to one another. Generation X grew up in the eighties, whereas the generation known as the millennials grew up in the nineties.
4. A version of a form of pop culture which differs from later or earlier versions. People sometimes dispute which generation of Star Trek is best, including the original and The Next Generation.