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  1. Life | Definition, Origin, Evolution, Diversity, & Facts | Britannica

    May 15, 2026 · Life, living matter and, as such, matter whose attributes include responsiveness, growth, metabolism, energy transformation, and reproduction. Each individual is composed of one or more …

  2. Life - Wikipedia

    Life is the capacity, in matter, for processes such as cell signaling, homeostasis, metabolism, cell growth, adaptation, response to stimuli, and reproduction. All life eventually reaches a state of death. …

  3. LIFE Definition & Meaning - Merriam-Webster

    4 days ago · The meaning of LIFE is the quality that distinguishes a vital and functional being from a dead body. How to use life in a sentence.

  4. Definition of Life – Introductory Biology

    Biology is the science that studies life. But what exactly is life? This may sound like a silly question with an obvious answer, but it is not easy to define life. Consider these puzzling examples: Is a robot that …

  5. What Is Life? The Scientific Definition and Criteria

    Aug 30, 2025 · Explore the scientific quest to define life, from its fundamental characteristics and origins to its vast diversity and the search for it beyond Earth.

  6. Life: Defining Life - Science for the Public

    Life: Defining Life The basic constituents of life are also the most common elements in the universe: carbon, oxygen, hydrogen, nitrogen. Many biochemists therefore regard the emergence of life as …

  7. Life - New World Encyclopedia

    A difficult term to define, life can be considered the characteristic state of living organisms and individual cells, or that quality or property that distinguishes living organisms from dead organisms and …

  8. Life: Definition, Meaning, and Origin - US Dictionary

    Jul 19, 2023 · "Life" is a word frequently used in everyday conversations, literature, philosophy, and science, yet it remains challenging to define precisely. In the simplest terms, it refers to the state of …

  9. What is Life? | Do the Math

    Jul 22, 2025 · Life is feedback. The sun is of huge importance to Life, but we would not say that it is alive itself even though it actively engages with the universe and is a critical contributor to living beings on …

  10. What are the characteristics of life? - NASA Science

    May 13, 2026 · Defining life from the viewpoint of examining its characteristics reveals how much life on Earth has in common, and helps distinguish between living and non-living things. If there is other life …