/ˈθɪəri/

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Meaning

An idea that tries to explain why something happens.

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Word origin

From Greek theoria, meaning a looking at or a considering.

Origin
Greek
Root
theoria

Grammar

Gender
Pluraltheories

Examples

.

"A theory about" is an idea that explains something.

.

Here a theory is a set of ideas in science.

, .

"In theory" means it sounds right, but real life may differ.

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English · Free printables

theory: worksheet, infographic and listicle

Free printable study downloads for the English word "theory" (An idea that tries to explain why something happens.): a worksheet with the answer key built in, an infographic, and a sentence listicle. Open any one to view, print or save.

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This word is taught in chapter 16, lesson 8: theory, fella, spring and 7 more words.