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Definitions

theory of relativity

NOUN

einstein's theory

Synonyms

STRONGEST

relativity

WEAK

continuum theory e=mc2 energy-matter relationship general theory of relativity principle of equivalence principle of relativity special theory of relativity

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.

None of this endangers the mathematical theory of relativity or the empirical science that confirms it.

From Science Daily • Jun. 8, 2026

This streamlined version—co-written with Leonard Mlodinow, a physicist and popular-science author—retains explanations of vital topics, such as the curvature of spacetime and Einstein’s theory of relativity, but dispenses with the drier sections.

From The Wall Street Journal • May 19, 2026

Einstein's theory of relativity showed that time is not fixed or universal.

From Science Daily • May 18, 2026

Then, Albert Einstein solved the tension by coming up with the theory of relativity, which explains how massive objects cause distortions in spacetime.

From Salon • Dec. 9, 2024

According to the theory of relativity, if light cannot get from one region to another, no other information can.

From "A Brief History of Time: And Other Essays" by Stephen Hawking