In theory

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adverb

According to the principles or ideas, but not necessarily in practice or reality.

In theory, the journey should take about two hours, but with traffic it could take longer.
Visual representation of "in theory" - According to the principles or ideas, but not necessarily in practice or reality.

Often appears as...

  • works in theory
  • holds up in theory
Definition 1 of 3
Visual representation of "in theory"
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Practical Limits

Shows a gap between how things could work ideally and real-world challenges or limitations.

Illustration for Practical Limits
In theory, anyone can become president, but in reality, it's a lot more complicated.
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Expectation vs. Reality

Used to express what is expected to happen versus what actually happens.

Illustration for Expectation vs. Reality
In theory, this coupon should save you money, but it might be expired.
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Skepticism

Can subtly suggest doubt about whether something will happen or work.

Illustration for Skepticism
In theory, the plan is sound, but I'm skeptical about its success.
Visual representation of the word "In theory"

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