universe

American  

[yoo-nuh-vurs] / ˈyu nəˌvɜrs /

noun

1. the universe. the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.

2. the whole world, especially with reference to humanity.

   a truth known throughout the universe.

3. a world or sphere in which something exists or prevails.

   his private universe.

4. in New Age philosophy and popular culture, a divine but nonpersonal being, consciousness, or field of energy believed to connect everything that is, allowing the interaction of the physical with the spiritual and thought with reality.

5. Also called universe of discourse.  Logic. the aggregate of all the objects, attributes, and relations assumed or implied in a given discussion.

6. Also called universal set.  Mathematics. the set of all elements under discussion for a given problem.

7. Statistics. the entire population under study.

---

universe British  

/ ˈjuːnɪˌvɜːs /

noun

1. astronomy the aggregate of all existing matter, energy, and space

2. human beings collectively

3. a province or sphere of thought or activity

4. statistics another word for population

---

universe Scientific  

/ yo̅o̅′nə-vûrs′ /

1. 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 universe is constantly expanding.

---

Other Word Forms

• subuniverse noun
• superuniverse noun

Etymology

Origin of universe

First recorded in 1325–75; Middle English, from Old French univers, from Latin ūniversum, noun use of neuter of ūniversus “all, entire,” literally, “turned into one,” from ūni- uni- + versus “turned” (past participle of vertere “to turn”)

Explanation

Universe is a big word — in fact, it includes all matter and all of space. We can't see or know much about the outer limits of the universe, but we know that it has them, and the idea of matter contained within boundaries gives us other meanings for the word. You might refer to a "universe of ideas," or when conducting a scientific study, create "a universe of data." Universe can also mean a defined set of something — the five blocks between the playground and home can be the whole universe for a small child.

Example Sentences

The findings highlight how Einstein's theory continues to shape our understanding of the universe, even in systems once thought to be well explained by classical physics.

From Science Daily • Apr. 19, 2026

A positive return is good news, but they still found that 47% of sales in their repeat-sale universe had negative returns, and 25% didn’t sell.

From Barron's • Apr. 17, 2026

Choking up, she added, “I told my mom, ‘I think this is the universe sending me what I needed to feel like I’m a part of this community.’”

From The Wall Street Journal • Apr. 17, 2026

He believes he lives in a universe where he is lord and savior.

From Salon • Apr. 17, 2026

Had he died in the flames, and was he now trapped in some sort of parallel universe?

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman