in theory
idiom
1
—used to say what should happen or be true if a theory is correct
In theory, the reading skills of the students should improve.
2
—used to say that something seems to be true or possible as an idea but may not actually be true or possible
I agree with you in theory, but realistically I don't think we have the time to do that.
Examples of in theory in a Sentence
Recent Examples on the Web
The 30-year-old felt like their primary fast bowler in theory, but that probably owed more to his reputation and previous experience.
—
Tim Spiers, New York Times, 17 Dec. 2025
The idea has long existed in theory but has never been observed.
—Neetika Walter, Interesting Engineering, 16 Dec. 2025
The private sector can, in theory, provide a vital antidote.
—Stephen Kotkin, Foreign Affairs, 16 Dec. 2025
These cases are rare but possible in theory.
—Kurt Knutsson, FOXNews.com, 14 Dec. 2025
See All Example Sentences for in theory
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Tim Spiers, New York Times, 17 Dec. 2025
The idea has long existed in theory but has never been observed.
—Neetika Walter, Interesting Engineering, 16 Dec. 2025
The private sector can, in theory, provide a vital antidote.
—Stephen Kotkin, Foreign Affairs, 16 Dec. 2025
These cases are rare but possible in theory.
—Kurt Knutsson, FOXNews.com, 14 Dec. 2025
See All Example Sentences for in theory
Cite this Entry
“In theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20theory. Accessed 20 Dec. 2025.
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