theoretically

American  

[thee-uh-ret-ik-lee] / ˌθi əˈrɛt ɪk li /

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.

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Other Word Forms

• antitheoretically
  adverb
• nontheoretically
  adverb
• untheoretically
  adverb

Etymology

Origin of theoretically

theoretical ( def. ) + -ly

Example Sentences

See Examples For:

theoretically

The pitch is familiar: Faster service, fewer mistakes and less repetitive work for employees, who will theoretically be freed to concentrate on something more important.

From Salon ● Oct. 11, 2026

A tech company could theoretically buy Oura, but a healthcare giant might be the more natural owner.

From The Wall Street Journal ● Oct. 6, 2026

Millions of different MOF structures are theoretically possible, Stylianou said.

From Science Daily ● Oct. 4, 2026

"The decline in crude should theoretically be a tailwind for risk, although that has not translated meaningfully into the broader equity tape," said Chris Weston at Pepperstone.

From Barron's ● Sep. 30, 2026

I don’t feel a rush of joy, although theoretically my allies have broken through.

From "Mockingjay" by Suzanne Collins