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  1. UNIVERSE Definition & Meaning - Merriam-Webster

    The meaning of UNIVERSE is the whole body of things and phenomena observed or postulated : cosmos. How to use universe in a sentence.

  2. UNIVERSE | English meaning - Cambridge Dictionary

    UNIVERSE definition: 1. everything that exists, especially all physical matter, including all the stars, planets…. Learn more.

  3. Universe - Wikipedia

    It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from sub-atomic …

  4. What is the Universe? - Science@NASA

    Oct 29, 2024 · The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you.

  5. Universe | Definition & Facts | Britannica

    Nov 1, 2025 · Universe, the whole cosmic system of matter and energy of which Earth is a part.

  6. UNIVERSE Definition & Meaning | Dictionary.com

    The totality of matter, energy, and space, including the Solar System, the galaxies, and the contents of the space between the galaxies. Current theories of cosmology suggest that the …

  7. UNIVERSE definition and meaning | Collins English Dictionary

    The universe is the whole of space and all the stars, planets, and other forms of matter and energy in it. Einstein's equations showed the Universe to be expanding. Early astronomers …

  8. universe noun - Definition, pictures, pronunciation and usage …

    Definition of universe noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  9. Universe - definition of universe by The Free Dictionary

    A hypothetical whole of spacetime, matter, and energy that is purported to exist simultaneously with but to be different from this universe: an alternate universe.

  10. What is the universe? - Live Science

    May 3, 2022 · The universe is literally everything, the sum of all existence. It includes all matter, like stars and galaxies. The universe also includes all radiation and all other forms of energy. …