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

Theoretically, you could tell the bot to build you a game, or an app to organize your schedule, or really anything your imagination allows.

From Slate • Apr. 5, 2026

Theoretically, an arbitrager should be able to buy units in the Sprott fund and short a basket of gold and silver in the same proportion as the fund’s holdings, profiting when they converge.

From The Wall Street Journal • Feb. 3, 2026

Theoretically, this kind of move could help solve two problems—getting enough power for AI data centers while sparing consumers from the costs at a time when electricity prices are skyrocketing.

From Barron's • Jan. 16, 2026

Theoretically, Saver said, medical and chiropractic boards are supposed to ensure that practitioners do not practice outside their area of expertise and training.

From Salon • Jan. 9, 2026

Theoretically, the nation that has its forces ready first gains a huge military advantage.

From "The War to End All Wars: World War I" by Russell Freedman