The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [9] Such contents comprise all of energy in its various forms, including …

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

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.

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

Nov 11, 2025 · Universe, the whole cosmic system of matter and energy of which Earth is a part.

Universe definition: the universe. the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.. See examples of UNIVERSE used in a sentence.

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

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 thought that our …

There are nine meanings listed in OED's entry for the noun universe, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

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.