hypothesis.
A tentative conjecture explaining an observation, phenomenon or scientific problem and that can be tested by further observation, investigation, or experimentation.
Meaning & usage
A tentative conjecture explaining an observation, phenomenon or scientific problem and that can be tested by further observation, investigation, or experimentation.
An assumption taken to be true for the purpose of argument or investigation.
The antecedent of a conditional statement.
Where this word comes from
Recorded since 1596, from Middle French hypothese, from Late Latin hypothesis, from Ancient Greek ὑπόθεσις (hupóthesis, “base, basis of an argument, supposition”, literally “a placing under”), itself from ὑποτίθημι (hupotíthēmi, “to set before, suggest”), from ὑπό (hupó, “below”) + τίθημι (títhēmi, “to put, place”). Compare hypothec.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.