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theory

[thee-uh-ree, theer-ee] / ˈθi ə ri, ˈθɪər i /


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.

One theory is that older baby boomers have already begun retiring and are relying on Medicare and other healthcare services, placing growing demands on the healthcare system.

From MarketWatch • May 30, 2026

In this case, that meant pulling from both algebraic number theory and discrete geometry, which have about as much in common as the marathon and pole vault.

From The Wall Street Journal • May 30, 2026

Zhang and his colleagues set out to examine a key assumption behind that theory.

From Science Daily • May 29, 2026

That is the same theory underpinning the controversial airstrikes since September on alleged drug traffickers' boats in the Caribbean and the Pacific.

From Barron's • May 29, 2026

In theory, a fission bomb could ignite a fusion bomb.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin




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