CEFR B1

theory

noun

Meaning

A set of ideas or a proposed explanation that has not been proven to be true, but is based on scientific reasoning.

Examples

The theory of evolution explains how life on Earth has changed over millions of years.
According to Einstein's theory of relativity, space and time are connected.

Synonyms: hypothesis, principle, doctrine, speculation

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theory (B1)

noun

Pronunciation: /ˈθɪəri/

Definition

A set of ideas or a proposed explanation that has not been proven to be true, but is based on scientific reasoning.

Examples

The theory of evolution explains how life on Earth has changed over millions of years.
According to Einstein's theory of relativity, space and time are connected.
There are many competing theories about the cause of the extinction of the dinosaurs.

How to Use theory

theory of (prepositional phrase): Used to specify the subject or field to which the theory applies. — "The theory of relativity changed our understanding of the universe."
in theory (idiom): According to what is possible or expected, but not necessarily in reality. — "In theory, this plan should work, but we'll see if it does in practice."

Synonyms of theory

Words with a similar meaning to theory:

Antonyms of theory

Words with the opposite meaning to theory:

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