Thesaurus.com
Dictionary.com
Definitions

theoretical

[thee-uh-ret-i-kuhl] / ˌθi əˈrɛt ɪ kəl /
ADJECTIVE
hypothetical
Synonyms
STRONGEST
abstract academic analytical imaginative intellectual logical metaphysical philosophical speculative vague
WEAK
as a premise assumed codified conjectural contingent formalistic formularized general ideal idealized ideational ideological impractical in the abstract in theory instanced notional on paper pedantic postulated presumed problematical pure quixotic suppositional tentative transcendent transcendental unearthly unproved unsubstantiated
Antonyms
STRONGEST
concrete ignorant illogical material objective physical real simple
WEAK
certain definite factual proven

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Theoretical models had predicted that the molecule could exist in two equally likely structures.

From Science Daily • Apr. 7, 2026

Theoretical physicists have pointed out fatal flaws in Mr. White’s reasoning and researchers at the Dresden University of Technology failed to replicate some of his results.

From The Wall Street Journal • Mar. 20, 2026

"It's a bit like the Cinderella fairy tale," says Benjamin Koch from the Institute for Theoretical Physics at TU Wien.

From Science Daily • Mar. 9, 2026

Narlikar stayed in the UK till 1971 as a Fellow at King's College and a founding member of the Institute of Theoretical Astronomy.

From BBC • May 23, 2025

The only groups that didn’t run numbers based on testing worked in the small Theoretical and Physical Research Division and the Stability Research Division—the “no-air” engineers.

From "Hidden Figures" by Margot Lee Shetterly

Vocabulary lists containing theoretical

Albert Einstein

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Unit 2: Pivotal Words and Phrases

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Unit 2: Pivotal Words and Phrases

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!