Supposition

//ˌsʌpəˈzɪʃən// noun

noun ·Moderate ·High school level

Definitions

Noun
  1. 1
    Something that is supposed; an assumption made to account for known facts, conjecture. countable, uncountable
  2. 2
    the cognitive process of supposing wordnet
  3. 3
    The act or an instance of supposing. countable, uncountable
  4. 4
    a hypothesis that is taken for granted wordnet
  5. 5
    a message expressing an opinion based on incomplete evidence wordnet

Synonyms

All synonyms
assumptionassumptionconjectureguesshypothesisspeculation

Example

More examples

"This supposition, that the Earth is immobile, was completely untrue."

Etymology

From Middle English supposicioun, from Anglo-Norman supposicion, from Latin suppositiō, suppositiōnem (“supposition”), from sub- (“under”) + positiō, positiōnem (“position; theme”), from positus (“position”), from the perfect passive participle of pōnō, pōnere (“put, place”).

Related phrases

supposition theorymaking proofs

More for "supposition"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.