theoretically

[thee-uh-ret-ik-lee]

adverb

1. in principle; according to reasonable assumptions or rules, as opposed to what actually happens.

   Theoretically they are free to work, but in practice they can’t because we do not recognize their credentials.

2. in a way that is purely speculative; hypothetically.

   It seems that theoretically the central bank could constrain government spending by allowing treasury checks to bounce.

3. according to, or in a way that relates to, a scientific theory.

   An alloy with a particular composition can be modeled to determine theoretically whether it has suitable mechanical and physical properties for medical applications.

4. in a way that relates to the set of principles or methods belonging to a particular subject, art, or activity.

   Taking classes in all four fields—politics, economics, history, and culture—allows students to be grounded theoretically in the humanities and social sciences.

Other Word Forms

• antitheoretically adverb
• nontheoretically adverb
• untheoretically adverb

Word History and Origins

Origin of theoretically¹

theoretical ( def. ) + -ly

Example Sentences

If scientists can understand the reactions that first redistributed the valuable elements, theoretically they could better locate new deposits of the materials today.

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And codes for new construction are designed to ensure only “life safety,” requiring buildings be designed so people can theoretically crawl out to safety during an earthquake.

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The work of Aghion and Howitt takes up the story from there, theoretically describing the “creative destruction” of moments like today, when the technological landscape is shifting under our feet, unsettling the largest players.

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Scientists have long believed this was theoretically possible, yet actually achieving it has proven far more difficult.

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So, theoretically, they should be easy to spot before they explode.

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