Hypothesis definition

hī-pŏthĭ-sĭs
Frequency:
Something taken to be true for the purpose of argument or investigation; an assumption.
noun
22
4
A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation.
noun
13
4
An unproved theory, proposition, supposition, etc. tentatively accepted to explain certain facts or (working hypothesis) to provide a basis for further investigation, argument, etc.
noun
12
5
Something taken to be true for the purpose of argument or investigation; an assumption.
noun
12
5
The definition of a hypothesis is an unproven theory or statement.

An example of hypothesis is the theory of evolution.

noun
6
0
Advertisement
(general) An assumption taken to be true for the purpose of argument or investigation.
noun
2
0
The antecedent of a conditional statement.
noun
4
3
A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation.
noun
2
1
The antecedent of a conditional statement.
noun
2
1
A statement that explains or makes generalizations about a set of facts or principles, usually forming a basis for possible experiments to confirm its viability.
2
1
Advertisement
(sciences) Used loosely, a tentative conjecture explaining an observation, phenomenon or scientific problem that can be tested by further observation, investigation and/or experimentation. As a scientific term of art, see the attached quotation. Compare to theory, and quotation given there.
noun
1
1
(grammar) The antecedent of a conditional statement.
noun
1
1

Other Word Forms

Noun

Singular:
hypothesis
Plural:
hypotheses

Origin of hypothesis

  • Latin subject for a speech from Greek hupothesis proposal, supposition from hupotithenai hupothe- to suppose hupo- hypo- tithenai to place dhē- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Recorded since 1596, from Middle French hypothese, from Late Latin hypothesis, from Ancient Greek ὑπόθεσις (hupothesis, “base, basis of an argument, supposition”), literally “a placing under”, itself from ὑποτίθημι (hupotithēmi, “I set before, suggest”), from ὑπό (upo, “below”) + τίθημι (tithēmi, “I put, place”).

    From Wiktionary