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Definition of supposition

supposition

/ˌsʌp.əˈzɪʃ.ən/
sup · po · si · tion
Adverb:suppositionally
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Plural:suppositions
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Adjective:suppositional
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supposition Lexical Profile

supposition Game Scores & Validity

• noun

1

An uncertain belief, assumption, or hypothesis held without conclusive proof.

Example

"The detective's initial theory was based on mere supposition rather than hard evidence."

Synonyms
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Antonyms
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• Rhymes for supposition

• Nearby Words

supposed
supposedly
supposing
supposition
suppository
suppress
suppressant

Word Origin & Etymology

Borrowed in the late 14th century from Old French supposition or Late Latin suppositio ('a placing under' or 'a substitution'), derived from the Latin verb supponere, combining sub- ('under') and ponere ('to place, put').

Cite this Entry

Wordmom. (2026). Definition of Supposition. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/supposition
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