The meaning of SUPPOSITION is something that is supposed : hypothesis. How to use supposition in a sentence.

SUPPOSITION definition: the act of supposing. See examples of supposition used in a sentence.

SUPPOSITION definition: 1. the fact of believing something is true without any proof or something that you believe to be…. Learn more.

Definition of supposition noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are nine meanings listed in OED's entry for the noun supposition, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

supposition (ˌsʌpəˈzɪʃən) n 1. the act of supposing 2. a fact, theory, etc, that is supposed

A supposition is a guess or a hypothesis. Your supposition that your kids will automatically wash their hands before dinner is probably false. You'd best remind them to do it or risk dirty hands …

Aug 28, 2025 · supposition (countable and uncountable, plural suppositions) Something that is supposed; an assumption made to account for known facts, conjecture. The act or an instance …

A supposition is an idea or statement which someone believes or assumes to be true, although they may have no evidence for it. There's a popular supposition that we're publicly funded. As …

SUPPOSITION meaning: an idea or theory that you believe is true even though you do not have proof