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supposition

/ˌsʌpəˈzɪʃən/ · sup·po·si·tion
noun
  1. Something that is supposed; an assumption made to account for known facts, conjecture. The scientist's supposition that the particle could travel faster than light was later disproven.
  2. The act or an instance of supposing. His supposition that the meeting would start early turned out to be correct.
Did you know? The word appears in Shakespeare's 'Much Ado About Nothing' (Act I, Scene 1), where a character says, "I am not a man of supposition."
Written by Lexi Wordsworth, Dictionary Editor 2 lookups Added Jul 27, 2026