Definitions

hypothesis

[hahy-poth-uh-sis, hi-] / haɪˈpɒθ ə sɪs, hɪ- /

NOUN

theory

Synonyms

STRONGEST

assumption axiom conclusion conjecture explanation guess inference interpretation premise proposition rationale supposition theorem thesis

STRONG

antecedent assignment attribution basis belief condition data deduction demonstration derivation foundation ground layout lemma philosophy plan position postulate presupposition principle proposal reason scheme speculation suggestion surmise system term

WEAK

apriority shot in the dark starting point tentative law

Antonyms

STRONGEST

fact proof reality truth

WEAK

calcualtion measurement

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.

That’s the hypothesis of one of the world’s shrewdest and most respected analysts of geopolitics and energy, Cambridge University political economy professor Helen Thompson.

From MarketWatch • Apr. 11, 2026

While she warned she could be wrong, she described her hypothesis as “connecting public breadcrumbs.”

From The Wall Street Journal • Apr. 8, 2026

Subject lines include “Recognizing the need for fasting,” “Mice blood age affects Alzheimer’s brain changes,” and “A casual hypothesis about epigenetics.”

From Slate • Mar. 30, 2026

The biggest flaw in the Hegelian viewpoint about supposedly great men is that his entire hypothesis about an unfolding historical process is flat wrong.

From Salon • Mar. 28, 2026

Hence one hypothesis for the demise of Australia’s and New Guinea’s giants is that they met the same fate around 40,000 years ago.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

Vocabulary lists containing hypothesis

The SAT: Language of the Test, List 1

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100 Top "SAT" Words

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Tier 2 Words for the SBAC ELA Items

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