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in theory

ADJECTIVE

hypothetic

Synonyms

WEAK

abstract academic analytical as a premise assumed codified conjectural contingent formalistic formularized general hypothetical ideal idealized ideational ideological imaginative impractical in the abstract instanced intelle

ADJECTIVE

speculative

Synonyms

STRONGEST

analytical dangerous experimental hypothetical risky unproved unproven unsubstantiated

WEAK

abstract assumed conceptive dicey formularized hairy hazardous ideal idealized ideological iffy intellectual logical notional philosophical presumed uncertain

Antonyms

STRONGEST

proven safe

ADJECTIVE

theoretic

Synonyms

WEAK

abstract academic analytical as a premise assumed codified conjectural contingent formalistic formularized general hypothetic hypothetical ideal idealized ideational ideological imaginative impractical in the abstract instanced intellectual logical metaphysical notional on paper pedantic philosophical postulated presumed problematical pure quixotic speculative suppositional tentative transcendent transcendental unearthly unproved unsubstantiated vague

ADJECTIVE

theoretical

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 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.

“It’s in theory an exciting moment, because they’re launching this new version, but it’s the expensive one,” Brauer said.

From Los Angeles Times • Jun. 10, 2026

A reformed set of spending rules kicked into force in 2024, and in theory member states risk fines for violations, though the EU has never gone so far.

From Barron's • Jun. 3, 2026

The firm's approach to this is based on exploiting the properties of a so-called quasi-particle, which had existed only in theory, since it was first predicted in the 1930s by Italian physicist Ettore Majorana.

From BBC • Jun. 2, 2026

Brian will have to pay filing costs and, if the judge did find that he took a frivolous case, he could, in theory, be held liable for Adam’s legal fees, too.

From MarketWatch • May 28, 2026

A chain-reacting pile would be more efficient but still existed only in theory, for Fermi’s most recent prototype had produced less than one neutron per fission—a definite fizzle.

From "Big Science" by Michael Hiltzik

in theory

Example Sentences

Related Words