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Definitions

expanding universe

NOUN

concept of the universe

Synonyms

WEAK

big bang model inflationary universe open universe oscillating universe pulsating universe

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The theory began to take shape in the 1920s, when Georges Lemaître linked Edwin Hubble’s observations of receding galaxies with Alexander Friedmann’s earlier equations describing an expanding universe.

From The Wall Street Journal • May 19, 2026

“In the quickly expanding universe of cases involving sanctions for the misuse of artificial intelligence, this case is a notorious outlier in both degree and volume,” Clarke wrote.

From Los Angeles Times • Mar. 27, 2026

Radiation in the expanding universe gradually lost energy as its wavelengths stretched with spacetime.

From Science Daily • Dec. 7, 2025

Belgian cosmologist and Catholic priest Georges Lemaitre made that connection by realizing that the theory of general relativity described an expanding universe.

From Salon • Feb. 14, 2025

An expanding universe resolved much of this at a stroke.

From "A Short History of Nearly Everything" by Bill Bryson