A generation is usually understood as a group of people born and living around the same period of time, often about 20–30 years apart, who share similar historical, cultural, and technological experiences.

Core meanings of “generation”

  • In everyday language, a generation is “all the people born and living at about the same time,” often spanning roughly the time from when parents are born to when their children are born.
  • In families, “generation” marks steps in a family tree: grandparents, parents, children, grandchildren are different generations.
  • In a wider social sense, labels like Baby Boomers, Gen X, Millennials, Gen Z, and Gen Alpha group people by birth years and shared events (wars, economic changes, digital tech, social media, etc.).

Typical time span

  • Many references describe a human generation as about 20–30 years on average, based on the usual age at which people have children.
  • This is an average, not a strict rule: in reality some people have children much younger or older, so exact boundaries are fuzzy.

Other uses of “generation”

The word is broader than just age groups:

  • In biology , generation can mean the act of reproduction or a step in the line of descent for organisms.
  • In technology and products , it describes a version or stage of development, like “next‑generation smartphones” or “third‑generation consoles.”
  • In math and geometry , it can mean creating something (like a curve or surface) through a specific process or motion.

Why generations matter as a concept

People talk about generations to:

  • Make sense of how different age groups see the world, shaped by major events and technologies of their youth.
  • Discuss social issues like work habits, politics, or education through the lens of age cohorts rather than individuals.
  • Analyze trends over time: for example, how each generation adapts to the internet, smartphones, or social media.

Quick forum-style perspective

If you read online discussions about “what is a generation,” you’ll see a few recurring viewpoints:

  1. Strict age-span view
    • A generation is roughly 20–30 years, tied to parent–child intervals, with labels (Boomer, Gen X, etc.) mapped to birth-year ranges.
  1. Cultural-experience view
    • A generation is defined less by years and more by shared experiences: the media, technology, and big events that shaped you growing up.
  1. Skeptical view
    • Some argue these labels are partly marketing and social shorthand, useful but oversimplified, since people in the same “generation” can be very different.

TL;DR: A generation is one “step” in a line of descent and, in society, a large group of people born around the same time (about 20–30 years) who share common formative experiences.

Information gathered from public forums or data available on the internet and portrayed here.