noun B2 Upper-Intermediate Uncommon

relativity

rel-uh-TIV-ih-tee

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Relativity (noun) means Relativity is the physics theory, developed by Albert Einstein, describing how the laws of physics and the nature of space, time and gravity depend on the observer's motion. Example: “Einstein's theory of relativity changed how scientists understand gravity and time.”

noun

Relativity is the physics theory, developed by Albert Einstein, describing how the laws of physics and the nature of space, time and gravity depend on the observer's motion.

"Einstein's theory of relativity changed how scientists understand gravity and time."

"Physicists still test the predictions of relativity using satellites and precise clocks."

"GPS systems must correct for effects predicted by relativity in order to stay accurate."

Relativity is the state or quality of being relative to something else rather than fixed or absolute.

"The relativity of moral values means that what feels right can differ between cultures."

"She spoke about the relativity of taste when discussing art from different eras."

"His argument rested on the relativity of success, since it means different things to different people."

How to use relativity

Learner’s notes

In plain EnglishRelativity is either Einstein's theory linking time, space and motion, or the more general idea that something depends on what it's compared to.

When to use it

In physics, relativity has a precise technical meaning that differs from its everyday, general use.

Memory tip

Say 'theory of relativity' when you mean Einstein's physics, since 'relativity' alone can also mean the general idea of things being relative.

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Easily confused with

relativism

Common pairings

theory of relativity general relativity special relativity Einstein's relativity

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C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

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Fill the gap

Can you complete this real example?

Einstein's theory of _____ changed how scientists understand gravity and time.

Etymology

Relativity was formed in English from the adjective relative plus the suffix -ity, which turns adjectives into nouns naming a state or quality. The specific physics sense translates the German word Relativität, used by the German-American physicist Albert Einstein in his work.

Origin: English

Synonyms

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relativism

Rhymes for relativity

city deity acuity parity brevity opacity paucity ability quality reality annuity gravity

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Frequently asked questions

What does relativity mean in physics?

It refers to Einstein's theory describing how space, time and gravity depend on the relative motion of the observer.

Who came up with the theory of relativity?

Albert Einstein, the German-American theoretical physicist who lived from 1879 to 1955, developed the theory.

Is relativity the same as relativism?

They are related: relativity's general sense overlaps with relativism, the idea that there are no fixed standards, but in physics relativity has a specific technical meaning.

What is the meaning of relativity?

"relativity" (noun) means relativity is the physics theory, developed by Albert Einstein, describing how the laws of physics and the nature of space, time and gravity depend on the observer's motion.