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
Another Galacticoaster is under construction that’s set to open March 6 at Legoland California, and, in theory, there could be more.
—
Dewayne Bevil, The Orlando Sentinel, 4 Feb. 2026
This could include secondary PLA ships, coastal batteries, and even, in theory, converted civilian vessels.
—Christopher McFadden, Interesting Engineering, 1 Feb. 2026
Last weekend’s hamstring injury for Patrick Dorgu means interim head coach Michael Carrick will need to recalibrate his squad at both the left-back and left-winger positions, but United, in theory, have enough bodies available for the 15 remaining matches of their season to muddle through.
—James McNicholas, New York Times, 31 Jan. 2026
Under the agreement reached Thursday, the Department of Homeland Security will be funded for two weeks — a period of time that in theory will allow lawmakers to negotiate guardrails for the federal agency.
—Kevin Rector, Los Angeles Times, 30 Jan. 2026
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Dewayne Bevil, The Orlando Sentinel, 4 Feb. 2026
This could include secondary PLA ships, coastal batteries, and even, in theory, converted civilian vessels.
—Christopher McFadden, Interesting Engineering, 1 Feb. 2026
Last weekend’s hamstring injury for Patrick Dorgu means interim head coach Michael Carrick will need to recalibrate his squad at both the left-back and left-winger positions, but United, in theory, have enough bodies available for the 15 remaining matches of their season to muddle through.
—James McNicholas, New York Times, 31 Jan. 2026
Under the agreement reached Thursday, the Department of Homeland Security will be funded for two weeks — a period of time that in theory will allow lawmakers to negotiate guardrails for the federal agency.
—Kevin Rector, Los Angeles Times, 30 Jan. 2026
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 6 Feb. 2026.
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